Thanks for your replies.

I would like to have it as a standalone application, which have to be installed on PC and the n900 (maybe n8x0, too??).
It would be good if it doesn't require any hacking in part of the user, so that ANY n900 user (I think many of the n900 buyes don't will have any experiences with linux) can use it without having problems.
Currently I'm using "mobiola webcam" on my e71, but the n900 will replace my e71, and that is currently the only application I'm missing.

Thanks!