Think Secret got it mostly right. The new headless Mac - Jobs called it BYODKM, Bring Your Own Display, Keyboard, and Mouse - is 6.5" x 6.5" x 2" inches tall. The $499 model comes with a 1.25 Ghz G4 processor, 256MB RAM, a 60 GB HD, and a Combo drive. On the back there are USB 2.0, Firewire 400, modem and Ethernet ports. There's a DVI display connector with a VGA adapter. For $599 you get a faster processor and more hard drive.