ive recently got a macbook, best thing ive ever bought.
I got the White 1, 2.16 core 2 duo, 2gb ram - was £800 - use the education discount and enter the name of a local store and it deducts a price and for a while you get a free ipod
I dual boot mine with Windows. No performance issues - runs better than my PC when in windows and OS X is an awesome OS. I'd never been near it before but within a day i knew how to use most of its great features.
They are obviously not gaming machines but can still play a lot of games in the windows partition at 30-60fps (Halo, Alien Trap, 1nsane racing) to name a few.
Would defo get 1, not even comparable to any other laptop!! - Where else do you see Core 2 Duo 2.16, 2gb Ram, 120gb hdd for £800 + its a mac