Check out this cool Zune app by Jos StamSkeel Lee based on an algorithm written by Jos Stam, which emulates an interactive Lava Lamp on your device. Rubbing your finger along the Zune Pad pushes the "fluid" around the screen, and makes for some really cool visualizations. Apps like these showcase all the cool things developers can do with XNA and the Zune device, but at the moment all this functionality is limited by the lack of an official Zune game store. If there's one thing I'd like to see in the next big update it's a well thought-out distribution chain for developers and consumers alike, without the need to jump through complicated technical hurdles to get the games and programs we want on our devices. So what are you waiting for, Zune Team? Get on it!