Rosewill RCM-3201V True 1.3 M Effective Pixels USB WebCam

Pros: It's a great webcam! It's small and has a clean, simple look. The clamp feels loose and is easy to fit, but actually grips my monitor quite securely. It has a light which indicates when it's in use, should be very handy to prevent inadvertent video. Video has low latency, good framerate (30 fps), good autofocus, and decent colors.

Audio is sufficiently loud, good quality, and reasonably low-noise.

It works flawlessly under Ubuntu and probably any version of Linux, since it depends Just plug it in, and the UVC-video and USB-audio drivers handle things. Skype, Cheese, all the webcam stuff works.

Cons: The "quick button" doesn't seem to work under Linux. I'm not sure what kind of USB interface it exposes.

The picture is fairly noisy at full resolution (1280x1024) and the max framerate of 30 fps. Drop it down to 5 fps, and things look really nice.

Overall Review: The cord is about 48-60 inches long, which isn't indicated in the product description. Sufficient for me, but could be an issue if your tower is far from your monitor.

Pros: Small size and small price. Nice picture. Easy installation in both Windows XP and 7.

Cons: Makes you sound high pitched and squeaky. Kind of like Mickey Mouse on helium. This problem comes and goes randomly.
The ring on the lens is small and hard to turn to adjust focal length.

Overall Review: We bought two of these and have used them on at least 6 different machines. We see the sound problem each time. It's definitely the cameras.
I would not buy these again.