OK, i got the little $8 camera working but it is not very good resolution:
It requires the "macam" driver, and i haven't found a matching one for linux yet... but didn't spend too much time on it.
And i still haven't figured out how to remove the infrared filter. I think the $25 one is the best choice for now, sadly. I ordered one more Creative cam just to see if we can get one for around $17, but i'm not too optimistic.