I made a presentation about UAV::Pilot last night, which is a library for controlling the Parrot AR.Drone under Perl. The video is up on YouTube:
I also announced the start of the WumpusUAV Indiegogo project. This aims to fill what I see as a hole in the market. The AR.Drone is comparatively cheap, but it's not completely open, and it has limits. ArduPilot is quite a bit more expensive (especially if you're starting from scratch with no previous RC experience), but it's open and you can do whatever you want with it.
I looked around, and I didn't see anything that started cheap, was open, and had limitless possibilities. So I decided to fill that gap.