You could try the Logitech QuickCam for Notebooks. I think it's about half the price of the iSight, with less image resolution and none of the nice aluminum.
I recently got a free Logitech Quickcam Zoom from Microsoft, its a great camera + the model i got (the new model) has a base which bends so that it can be used on any monitor, including ibook/powerbook (i have a ibook)
doesnt apple have another brand webcam they sell at the apple store???? -looks up name and link- cant remember it off the top of my head, but i dont think it costs 150$
Comments
http://www.amazon.com/exec/obidos/tg...&s=pc&n=507846
http://www.logitech.com/index.cfm/pr...CONTENTID=5040
Griffin webcam
thats $39.95
good luck