This thing rocks. But it's a bit out of my budget.

http://benheck.com/Games/Xbox360/x360_page_1.htm

Some guys made this:

http://www.engadget.com/2007/01/19/the-wii-laptop/

He doesn't give a total price, but that 360 laptop is a heck of a project. I wonder if you could bring back a ring of death 360 by doing something like that; a little resoldering here, a little new cooling there... Just need to find someone with a spare 360 or two...

haha nice, theres some kids who made a portable Gamecube, my girlfriend showed me it a while ago, I'll look for the links