iUSBCam is plugin that allows iChat to work with most any USB webcam.
Version 2.2.5 adds support for using a USB webcam with iChat in Mac OS X 10.5.6.
RequirementsMac OS X 10.2 or later, iChat 2.0 or later, a QuickTime video source such as a USB webcam with compatible drivers, QuickTime 6.4 or higher is required to use advanced iSight settings.
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