Must have gadget: iPhone-controlled, solar-powered Tank !

Are you the type of person who likes to handcraft your Christmas gifts? This year, perhaps you can make someone's Christmas Day just a little bit brighter and happier when they unwrap their very own iPhone-controlled, solar-powered Arduino tank.

As you can view in the video above, the tank is pretty impressive in its current form; it could be used to strike terror into the hearts of unsuspecting senior citizens or small animals. It was built by Chris Rojas, a Colorado-based geek who used the iPhone TouchOSC app [US$4.99, iTunes Link], various parts from SparkFun including XBee modules and robot kits, and the Arduino open-source electronics prototyping platform to create this cool little tank. The tank can be charged by exposing a belly-mounted photovoltaic panel to the sun.

Maybe it's just me, but I'd love to see one of these modded out with a spinning saw blade, lasers, and maybe a paintball gun... What would be your accessory of choice for your iPhone-controlled tank?
You can find our other blog on Solar Energy on Thousand Suns