I got a new 3DS and I used the SD card form my old one, and the Street Fighter IV 3D save still is there, working (all my points, titles, everything still there). BUT my Miis, Streetpass Plaza, and all my other "Built in Nintendo" channels were not still there. Apparently built in apps save to the system (which has 200 blocks of internal memory apparently) and other titles save the the SD card. Note I tried Nintendogs and the save was able to work on another 3DS too, and THAT was with a different cart. So Nintendo games are not copy protected (like Wii ones usually are) YET and saves are in fact only saved to the SD card. I can't remember if anybody posted results of this yet, or if anybody ever confirmed these things, if these are not news by all means lock this thread.