i'm about to get started with audio and video conferencing with distant family... does it matter whether I have .mac or AIM? is iChat the best conferencing program to use if the other people have macs? what's the best program if I want to chat with PC users? how fast does the computer need to be for acceptable video chats? (would my old ibook G4 800 be OK with an external iSight?) Thanks, apologies if this has previously been discussed i did a search and flicked through recent threads but couldnt see anything quite right.