While we're on the subject of supporting other processors, you know what would be really awesome would be XMEGA support. I'm not sure why they chose to go with the arm processor they used in the DUO, but that chip is huge and seems to require a whole lot of support circuity. I don't think I'd ever want to take that processor and stick a bare bones version in my own project. The xmega on the other hand comes in a small 44 pin version, looks easy to use, has a built in DAC for audio output... Aside from running a 3.3v potentially being a problem for controlling servos, for projects that need a little bit extra oomph, and 32mhz xmega seems like an excellent choice for an upgrade if you need twice the speed and/or audio output.