Apple have revised the iMac, Mac Pro and Mac Mini.
The Mac mini now sports FireWire 800 (woohoo!) instead of FireWire 400 and also the NVIDIA GeForce 9400M, and is touted as the “World’s most energy efficient desktop computer”, using only 13W when idle (possibly because it doesn’t have a screen? 
It now has a mini DisplayPort and mini DVI connectors, and 5 USB connectors.
The Mac Pro now comes with Intel’s Nehalem processor at 2.93GHz, and Apple’s claiming up to 2.4x performance over the previous 3.2GHz Mac Pro model.
Meanwhile, Airport networking is now supported in 2.4GHz and 5GHz bands simultaneously on Airport Extreme and Time Capsule, along with providing a guest networking mode to provide internet to your visitors without having to reveal your password to them.
