I recall that the iSight is powered via the FireWire 800 port, but on the G4 iBooks they only have a 400 Firewire port, which I don't believe provides power. So my question is - does the iSight work with the iBook? An additional question is I remember something about extra USB ports on the Mac keyboard. Are these also on the wireless keyboard, and what are they (ie: 2 USB, 1 firewire) Thanks!