As far as my use cases are concerned, the most important thing is to have a simple, device independent, webcam api to use from standard pygame (with the same api in the OLPC pygame derivative).

The first use case for me would just be to let people take snapshots of themselves to add to high score tables, or to let them create sprites direct from the camera.

Beyond that, motion detection would be cool (complicated use case would be a tennis game where you can hit the ball with your hands)

I’d not want to rely on opencv, though – especially as part of pygame – it’s a fairly large overhead (dispite the benefits).

I’d love to have your camera interface added to the main pygame trunk as soon as it’s stable (don’t know who manages the pygame trunk, though). Good luck over the summer.