iChat AV is one of the reasons I want a Mac. Si and I have regular weekly conferences to catch up on ELATED and other work stuff, and we’ve tried everything from Egika / OhPhoneX (where do they get these weird and wonderful names from!) through to Skype and Gizmo.
They all work after a fashion, but none of them particularly elegantly. I just tried getting Ekiga up and running after a recent Debian upgrade, but I can’t get the pwc driver for my webcam to compile without chucking incomprehensible error messages on the screen, so I guess that’s a non-starter unless I want to muck around for half a day.
Skype and Gizmo aren’t bad and at least don’t involve mucking about with firewall configs, but they’re audio-only on Mac and Linux (video coming to Skype on Mac soon I hear), and on Gizmo Si sounds like he’s rustling a plastic bag every time he talks. (He swears he’s not.). His Skype also has a nasty habit of crashing his Mac. Also tried OpenWengo but again – audio only on the Mac. Though it does work pretty well.
iChat AV (if it works as advertised) will be great – plug & play, excellent full-screen quality and 4 way video chats. (though I still reckon the latency between Australia and the UK might be slightly annoying.)
Now I just need to convince my Dad in Italy, who moved from Mac to PC a couple of years ago, to move back to a Mac so I can iChat with him too!