I saw a project a while ago (I want to say a week or two?), that had something to do with I think image recognition using webcams? IIRC, it would watch for generally people-shaped things, and start recording when it saw them. Anyways, the more interesting thing for me right now is, iirc, they had developed modular nodes with a USB webcam, a microcontroller, and a network interface. ..so, basically an open source networked webcam.
Any ideas? I want to say I saw it on HaD, but I looked back through the last few pages of stuff and couldn't find it.