Here's another cute board I could lay my hands on today:
This is a 2.4 GHz analog audio/video receiver that connects to a USB 2.0 port (model GP-722, manufacturer unknown). It receives a color video signal from up to four little battery-powered cameras (you know, the kind you see in spy movies or the kind you might put inside a model airplane).
Unfortunately it doesn't work yet under Linux. It uses a Trident TM5600 encoder/USB interface chip, which is a cheaper variant of TM6000. That one seems to have some support under Linux. Maybe I will actually be able to use it after some hacking.
Update: Since a lot of people are looking for it, I've dug out the original driver CD for this hardware and put its contents on-line.