UPDATE TO ON THE DSi!
If you are a poud owner of a dsi (I am to be in a day or two)
you will get bored what with you have.
... I am going to tell you a few secrets.
1. record a sound on dsi sound and save it, once saved hover over that for 1 minute and it will play the mario theme!
I will update soon, got xna to learn (yes, very unlikely i know)