WuffCam is the easy-to-handle software for your Webcam on Mac OS X. The simple user interface and fast installation makes using your Webcam “as easy as turning a radio on,” according to the developer, wuffwuffare. Plug-in the camera, start WuffCam and you are able to broadcast the images to your local intranet to Rendevous-aware web-browser or copy them to the Internet. Wuffcam combines a server and a client in one application and works with almost every QuickTime-compatible camera.
More info (in German) here.