stride gum case (shaped the same for putting gum into wallet)
flash drive
led+button cell battery
id window
five gum case made with duct tape to put normal sized gum in
multiple credit card holders
a snap to hold it shut made of the positive and negative clips of square 9v battery
possibly a small motor for emergency use.
a small flap to hold some razer blades/xacto knife replacement blades.
coin purse
several feet of duct tape rolled onto old gift card to be put in credit card slot
ds game case
money clip
phone case
small box of matches (re-make out of tape and tape the striking pads back on)
-or just a pouch for the matches and a slide-out striker pad from larger box of -matches, or just put larger striker in credit card slot
mini calculator
some extra leds and/or button batteries (take out of 12 v battery) vid here: http://www.metacafe.com/watch/773138/12_volt_battery_hack_youll_be_surprised/