I was thinking, if you're on the go, why not put your empty shoebox to good use? Put a computer in it! Basically, its a shoebox that houses a computer, but the cardboard would probably have to be reinforced on the inside because cardboard is a bit flimsy for a computer case..
The top flap could open for fans or something to get airflow going through the thing if necessary, unless of course you put liquid coolants in. Either way, popping the top flap would be fun to see the insides. Then you could put holes on the sides and stuff for all that other stuff like USB hubs and DVI ports and etc.
Then, when you go to a lan, they're all like, "Why'd you bring shoes?" and you'd be like, "This thing? Its my computer!" and then everyone would be confused and amazed at the same time..