i think its the 'quick cam' that works. I bought one today and its fine.
I paid £29 for it reduced from £39
prior to that i bought a cruddy philips one.
I read lots about logitech ones. The ones which work on macs are the one I mentioned above.
You can buy the special notebook style ones but there like another £20.
I have got excellent quality and vid streaming from this little camera and it has what quite a lot of the other more expensive ones have to.
So I think you should take a look at the Logitech Quick Cam range.
hope this helps