MacBook Air

http://www.apple.com/macbookair/specs.html

I dunno. First response was "OH SO COOL!"

But taking a look at the specs... they trimmed .24 inches off the height, and cut the weight in half, when compared to my MacBook Pro. At the cost of ethernet, hard drive size, optical drive, firewire, audio in, screen size... Better trackpad though - has the pinch-zoom system.

Also, only a tiny bit cheaper.