PLX Kiwi, as seen above, is a plug-in device that analyzes how you drive and teaches you how to do it in the most gas-efficient way possible. Although you could easily accomplish the same thing by yourself after reading some tips online—Kiwi says you get about 20-33% improvement in your MPG—it's easier to have something always there reminding you to not gas so hard or drive so fast or brake so much. There's also "challenges" that teach you how to do this, which could be a fun distraction when you're driving along a long stretch of highway. On the other hand, the Kiwi has a MSRP of $299, which takes a bit of savings to earn back. [PLXDevices]

From what we've heard, a 22-foot robot can be a pain to keep. Sure, it sounds great at first—get carried everywhere, never wipe yourself again—but you never know when a robot will reach singularity and gut you in revenge for making it love like a real person.

Luckily these styrofoam robots by artist Michael Salter come with no such caveats. His tallest creation reaches over 22 feet in the air and is held together by a wooden skeleton. But the most interesting part of the work is that he didn't know if it would stand until he set it up at the museum.

(this is obviously a different robot)

Salter was forced to build the robot in chunks—arms, legs and torso. It wasn't until he reached the San Jose Art Museum (where the exhibit is on display through October) that Salter assembled the robot in full for the first time. And it stood!

But apparently it could fall with a firm push...not that anyone would mess with a giant robot, styrofoam or not. [Komo News via DVICE]

You may disagree, but we think this MacBook Air keyboard mod for the iPhone looks super neat. The package installs directly from Installer.app and gives your on-screen board the black separated look that the standard MacBook and the MacBook Air both feature. It's just cosmetic, and doesn't affect your typing performance in any way—unless of course you type faster when you see black plastic. It also uninstalls without destroying your phone, which is a plus. Grab it now, but you might have to add this repository (http://planet-iphones.com/repository/) first. [Just Another iPhone Blog via Into Mobile]

There are few things more enjoyable on a hot summer's day than an epic water gun battle with some friends. In the end, everybody wins, because everybody gets soaked and cools down. But you don't want to be caught with a crappy gun; then you'll just be the guy that everyone else gangs up on. We here at Gizmodo don't want that to happen to our beloved readers, which is why we took on the horrible, difficult task of playing with testing five of this season's hottest water guns under $20 to find out which one is going to give you the most splash for your cash.

We tested five guns, the Super Soaker Steak Attack 4-Way, the Sizzlin' Cool Steady Stream, the Water Warriors Motorized Tarantula, the Super Soaker Quick Blast and the Banzai Color Stream Blaster.

It should be noted that each gun has its own gimmick that it uses to try to sell you on it while you're wandering the aisles at Toys R Us or Target or wherever it is you purchase your weaponry. By far the most useless was the Color Stream Blaster, which comes with little cartridges of dye that turn the water various colors. This means that after you have a water gun fight, your victims will need to go take a shower and do laundry. That seems like it'd be less fun, not more, so we ignored those things altogether.

Much more fun were the nozzles on the Sneak Attack 4-Way, which let you change the stream by twisting the front of the gun. You could do a thin, powerful stream, a broader misting stream, or fire sideways in either direction. Let me tell you, there are few things more satisfying than saying "Hey, check this out!," pointing the gun off in the distance and then pegging your friend point-blank in the face with a sideways shot. It never, ever gets old.

For the official testing, we first measured the distance that these things can fire compared to their box claims. You never want to be hit by someone you can't hit back because your gun sucks and you're too far away. Surprisingly, the claims of distance made on the boxes was often wildly inaccurate. The Super Soaker Quick Blast, for example, claimed to shoot 25 feet, while we could barely get it firing past 18 feet. The other Super Soaker, on the other hand, claimed a paltry 20 feet, but in practice the thing shot nearly 30 feet (the best of the bunch).

We then wanted to know just how much pain could be inflicted with a shot to the face from each of the guns. Luckily, Summer Intern Dan was there, so we set him up facing the camera and took turns blasting him in the face from a few feet away, recording his reactions. The most painful shot was the Sneak Attack due to its powerful blast, with the Color Stream Blaster and Quick Blast each delivering paltry bursts that he could barely feel.

So what gun do we recommend for your next battle? Well, the Color Blast is a decent gun if you ignore the, you know, color element, and it comes in a two pack, which is nice. However, you feel like you're paying extra for something you won't use, so unless you really want to spray red water at someone, I'd recommend passing. The Tarantula just felt like cheating due to its rechargeable battery that removed the pump action from the mix, and it's a pain to have to rejuice a water gun between uses. It has a huge tank and a decent distance, but for $20 it's definitely the most expensive gun, so it's hard to recommend.

The Super Soaker Quick Blast was definitely at the bottom of our list, with a pathetic stream and a cheap-feeling pump. It doesn't hold much water, either, and whoever got stuck using it during our battle royale was at a serious disadvantage. Avoid it if you can.

The Steady Stream, the cheapest of the guns, was actually our runner up, surprisingly. It doesn't have any real gimmicks to it, but it's a solid gun that fires a good distance and is fun to use, especially for the price.

At the end of the day, however, there was a very clear winner amongst our array of weaponry, and it was the Super Soaker Sneak Attack 4-Way. It shot the farthest, had the most fun gimmick, had a respectable capacity, and was one of the cheapest at under $10. It feels solid in your hands and is just the most fun gun out of all of the models we tested. And really, if a water gun isn't really fun to use, it's doing something wrong.

Over at The Audiophiliac they're running a story about a visit to the house where abstract painter Jackson Pollock used to live with wife Lee Krasner. Apparently the guy had a pretty cool hi-fi: a Bogun DB-20 tube amp, a Crown turntable and speakers built into a stairwell. Audiophiliac's Steve notes that the door holding the speakers "is covered with Pollock's trademark paint splatters, drips, and blobs," so it probably counts as a minor work of art all of its own. And of course "Pollock loved to play his hi-fi really loud, especially when Krasner was out of the house." I wonder if the volume helped with artistic inspiration? [The Audiophiliac]

MIT's Tech Review ">has the scoop that Intel's wizards have come upwith a new chip entirely made out of silicon that "can encode 200 gigabits of data per second on a beam of light" versus the measly 100 Gbps that the fastest optical networks currently churn at—which aren't made of silicon. Which means they can't scale nearly as fast or cheaply as Intel's silicon wonder. And this is all on the way to making a fingernail-sized chip that can crunch a terabit of data. Here's how this photonics business works.

Intel's chippy takes a beam of light and karate chops it into eight channels, each of which has a modulator that encodes data onto light. These data-ified beams are then recombined, and boom. This all at happens at a rate of 25Gbps per modulator. This stuff is the building blocks of a computer future where copper is replaced by beams of light. But before that happens, Intel wants to cram 25 modulators onto a single chip, with each one running at 40Gbps, maybe with hybrid lasers built onto the chip to toss light at the modulator instead of an optical fiber.

Time to market? Three to five years. Fingers crossed. [MIT Tech Review]

My attempt: "Hunting season really needs to start earlier this year."

Surely, you can do better. [MetkuMods via Unplggd]

Those who threw down the extra cash for a first gen PlayStation 3 got a few bonuses in return—the newer 40GB version is shy a few USB ports, a memory card reader and hardware-based backwards compatibility. Nyko is solving two of these problems with their Media Hub, a 3-port USB hub with media card reader (SD and Memory Stick). Compatible with all available PS3s, the Media Hub snaps seamlessly onto consoles and works from a horizontal or vertical position. Expect the Media Hub to hit stores this August for $20. Sorry you're still jacked with the backwards compatibility stuff. [Nyko]

Last time we talked about Blackbox gizmos from Gear4 it was a largeish Bluetooth speaker, but this new one is different. It's wired, USB-powered and designed to be a portable companion for an MP3 player. You may think size sacrifices bass power, but apparently it's got an "SFX gel" base, meaning it uses any flat surface you stick it to to amplify sound volume and bass. It's got a normal driver too, takes line-in, and can be powered with a power-brick. Gear4's site doesn't reveal exactly how small it is, but it's out August in the UK for $40. [Gear4 and Pocket-Lint]

According to DigiTimes, Apple just placed a very large order of NAND flash chips from Samsung, which has in turn forced Samsung to tell other customers to wait. 50 million 8GB chips were reportedly ordered by Cuptertino primarily for use in Apple's iPhone (that's on top of the 25 million that were ordered in June). So now you know, Apple is that jackass driving the minivan through the McDonald's drive-thru, ordering like a million happy meals and slapping their kids in the backseat while yelling, "That's it, now you're never getting your 32GB iPhone!" [DigiTimes]