Solution 1:

I had a look at "Logitech HD Pro Webcam C910", (STAY AWAY) (but I read that various mac users had issues with it, so I investigated.)

I found this on TUAW,(2011-01-04) Logitech's HD Pro Webcam C910 now ready for Photo Booth, iChat and FaceTime :

The software allows integration with iPhoto and iMovie, and enables the C910 webcam to be used with Skype, Yahoo! Messenger and Gmail Voice and Video Chat.

I really can't help you ... I would hold out for the Logitech ... maybe a updated Driver will fix the issues.

Solution 2:

Saw this on Mashable and thought about the question :

http://mashable.com/2011/05/24/logitech-c910-review/