We use ichat av, it came on our mac's, our daughter video chat's with her cousin in Virgina on a regular basis. I also use it to talk to two of my friends back in Michigan, the cool part is that one we can do a 3-way video chat with sound, and the video is not choppy at all, it is almost as if you are there. Also, the one friend has a pc, he uses his video camera hooked directly to his computer via firewire, and uses AOL. All very cool!
Greg
Forgot to mention, my newest imac has a built in camera, and I purchased a "isight" camera for my daughters imac. Then a second isight for my webpage, it is mounted out on the patio so all of my friends/family, can view a live image of our weather and the mountain here in Palm Springs.