Ok, so I wanted to kill some time and do something different... (I admit up front: This either goes in the uber-geek category or just the Plain Weird category...)

I made this keyboard circuit board wallet and then was like "..ok...what do I do with this thing...?"

Turns out, at 3"x4", it fits perfectly in the pocket of my reporter moleskine. I put my metrocards, starbucks card, thin metal ruler, kid art on scraps of paper etc. in it. All the loose stuff. Now it's in one VERY lightweight, ultra-thin compartment that stays separate from the other stuff in there (index cards etc.)