Play with a Mini-SD Adapter and see what you can find. You can crash the 3DS in whole new ways. I think I ended up finding an interesting "SDCard-canceling" mode where the 3DS will refuse to accept anything from the SDCard unless the SDCard is pulled out and then reinserted. It's quite...
I've been searching around for a confirmation on this potential hack. According to http://coburndomain.org/index.php/2011/08/...-io-apparently/ a guy by the name of MSaki conceived a brilliant plan for injecting unauthorized code through the 3ds.
This process was vaguely described as the...