The pcDuino is a pretty exciting board. It can do just about anything you might want. For those of you looking at a Raspberry Pi, but wanting a bit more, you should check out the pcDuino. Not only can it run Ubuntu and/or Android (yes, and/or) you can connect Arduino shields to it, connect it to your network, and more. Check out the video from Sparkfun for more information on what it can do and how to get started.