as far as transfering things over, plug the cable in, start the imac in firewire disk mode, and use the migration assitent in the book to copy over. as far as syncing them after that, i have been told that the best thing is .mac, i have never needed to do such a thing. there are also other kinds of apps that do stuff like this for you. i think mac addict had an artical about it in either their jan or feb mag.
Digital Audio G4/1.467ghz, 1.5gig ram, 16x Superdrive, 256mb DDR3 AGP 6800GS, zip, 2x500gig raid0 for 1tb on sonnet tempo trio, 10.5.4