I am interested in seeing FreeIMU continue. However, I'm incredibly busy with porting Arduino libraries to 32 bit ARM (I did FreeIMU about a month ago).
At the moment, probably the best I can do is offer the extra 4 blank boards I have to people who seriously wants to get involved. They were ordered from OSH Park, and they're not expensive, but if I send you one of mine it'll save a few weeks waiting for OSH Park to make it for you.
So, anyone reading this who seriously intends to work on the FreeIMU software, please email me directly, paul at pjrc dot com, and I'll send you one of these 4 leftover boards.