I was looking for a good way to store my Arduino chips as well as some other components. I wanted something that was anti static and something that was sturdy. I have long since hacked my DS to have all the games loaded on one SD card so I no longer use the individual games. With 10 game cartridges sitting around, more over their cases, I decided to gut them and use the shell to store my chips.
First I cut out the place that mounted the cart, and then also the fingers for the manual. Next I cut a peice of 5mm thick art foam I purchased from Hobby Lobby, using double sided tape I stick it to the back of the case. This foam will be slightly thicker than the length of a normal DIP IC pin leg. Also it is easy to write on with a ballpoint pen.
I use the outside cover to put pinouts, chip info, and some basic schematics