1. Just had a chat of about half an hour yesterday via ISDN/IP (and NAT-Router) with my USB based Philips ToUcam-Pro and Macam 0.8 driver. Video worked fine up to the point when I tried to transfer a picture of about 1.5 MB to my chat partner. (May be an iChat AV problem?!).
2. I used a G4 TiBook 400. Because iChat AV does not work with its internal mic I used my cameras mic. Worked also fine.
3. The most important thing is, that iChat AV crashes without iChatUSBCam, when my USB camera is connected to my computer. So without this plug-in: No chat with connected cam.
4. It would be nice to have some video adjustment controls.