A pencil.
MAYBE a bottle of water.
Just not a huge fan of the Apple "Thou Shalt Not Mess With Thine Hardware" aesthetic. Not that I'd turn one down if it were given to me - I entered the Washington Examiner's Ipad 2 contest every day, up until it ended on May 22nd (didn't win one, though), but I wouldn't pay anywhere NEAR $600-800 bucks for them to tell me what I can and can't do with MY hardware.