This is more then likly not new to DS owners. I thought it was cool so I thought I would share.
You can fit GBA games in a DS case. Which to me is really nice considering cardboard really dosen't hold up to well.
anyhoo...
This Site(<Link) Has a few homemade inserts most Scanned from the orignal Boxs and made up to look really nice once printed out. he even tells you how to make them up yourself and gives you a direct link to the nintendo store so you can order the cases. (I ordered 40)
I came across this a week or so back and thought it was a really good Idea so I made myself a few.
heres some crappy pics of mine (bad cellphone camera)
They look way better then that camera can display.