I have it working, yes - but only some programs can access it reliably. The little nice script I use for upload to this site doesn't work alwys... and that pisses me off. It seems to work with GnomeMeeting reliably (I just can't do calls with the FritzBox in between, but local capturing works well all the time). Other programs work, too - like for example 'camorama', but camorama again gives some veery bad picture. It all seems to boil down to my personal lack of understanding of the v4l2-system. I thought of getting a Labtec webcam - but now I hear, that it has problems with low lighting... :(
Webcams and Linux seem to be a pretty tricky subject...