I've been working on a development board based on the PSoC 3 and 5 chips. It's similar to the Arduino form factor, but with some unique features to take advantage of the PSoC's ability to use any IO line for any peripheral - features which eliminate the issue of IO conflicts.
I've posted lots of details, and everything you need to build your own expansion board, here: http://dangerousprototypes.com/forum/viewtopic.php?f=56&t=4842
Any feedback you have to offer is of course greatly appreciated!
