Hi, I have an ATV2, and an old Powerbook G4 1.67. Can I use it as a server (like the Mac Minis were used?), and can it capably stream high def content? Just want to see if it has any good uses... I'm also curious as to why something like the ATV2 can handle HD, when its chip (most likely) maxes out at 1ghz, and the Powerbook can't play HD, really. p.s. there wouldn't be any value to *just* having the Powerbook instead of the ATV2, would there? Thanks!