IBM thinkpad
Bump.
I just got a t60p: Duo Core 2, 2GB Ram, 100GB HD, 256 dedicated vid card, high def screen, etc, and it's fucking sweet.
I have the 15" version but it's very thin and light, but I know thinkpads have 11, 13, and 14" verisions if you want something a little more portable.
I highly recommend it. Only problem I had was when some security software i installed conflicted with the fingerprint reader/inbuilt security chip. Took like 10 minutes to fix.