These days I use my company-issued MacBook Pro. It's amazing how small my 12" Powerbook seems in comparison. Sadly, it's no longer in an usable state. I'd still want to get a 12" (or smaller) MacBook Pro (if they ever make one): it's so easy to carry around.
FWIW, now I have more sticker space. :-)
Oh, here’s an useful post for you geek fashion n00bs (gosh, it almost feels retarded saying that) on how to (and how not to) accessorize the ultimate geek fashion accessory.
(Whee, fourth post already!)