60 posts since
May 17, 2001
I'm no expert on this. In a recent work assignment I demonstrated a Windows program called NetMeeting. It began as a free download and is now part of some installations of Windows 2000 and maybe others. It complies with a videoconferencing standard called H.323 and so, I believe, does iChat AV.
I may be trying this myself using ichatUSB, a program to allow even my slow 500 MHz G3 iBook to use videoconferencing.
The thread Isight and Windows World mentions iVisit, which I have heard of. Good luck!