The Skeleton key!
But seriously, a box.
Containing a top of the line laptop, a gaming desktop, a tent (in case I'm not in solitary, I want privacy) an iPod Touch (all with 500 terrabyte hardrives) and a really fast wireless router.
And a tv, along with a ps3 and a huge library of games. Along with a credit card belonging to billionaire.
Actually seriously, a laptop with a huge ass hardrive.