So I bought a DS awhile back for my insane amount of long air ventures mostly for final fantasy games. I got myself an R4 adapter for it. For those of you who don't know what this is; It is a 3rd party mod bypass card which fits into the game cartridge slot that you can fit an sd memory card into. I highly recomend it if you have a ds. Here is a list of the neat crap you can do with it.
Only drawback is I have a 1 gig mem card. Some app's games are hard to get working properly. Overall this will burn a lot of time for me.
1. Turn your DS into an IPOD movie player
http://youtube.com/watch?v=MUpAlKknlEQ
2. Internet browser (nintendo or Opera)
http://youtube.com/watch?v=QR2yfhBSvR0&feature=related
3. VOIP via built in wireless
http://youtube.com/watch?v=mtIO3-9dJA8
4. Remote Desktop (havn't got it to work yet as it was wrote by MooKeTTe or his brother and instructions are hard to understand rofl.
Once I get this working, I plan on running well control with it for a completion rofl.
5. Various homebrew games/apps ran as roms. Calculators and such tower defense games and Starcraft lite which i still have yet to get working hehe.
http://youtube.com/watch?v=L9G_1EZWVwg
6. Complete back-up of DS games. I can put like 20 roms on a 2 gig mem card.