Why doesn iChat recognize my camera?
For some reason, probably pertaining to some minimum acceptable (Apple) quality level, iChat will not work with regular USB webcams. It works fine with iSight and the built-in cameras in the Intel-based notebooks (which are USB devices). There is a solution however,iChatUSBCam is the name of a shareware program which seems to work for many users. In the long-term, I recommend that users who are inconvenienced by this Apple policy send in a feature enhancement request for iChat (or, perhaps more properly, file a bug report).