3DS Flash cart (rumor)
One friend of mine has bought Nintendo 3DS and also a card from a large online store http://www.ps3breakr4.com. Then he asked me if it was worth buying the Nintendo 3DS (with "backups" in mind), so I had a look on the internets, and found this:
http://www.gonintendo.com/viewstory.php?id=152029
There may be a stealth release of firmware soon, so if any one finds flashcarts that allow you to play "backups" for the 3DS, youˋve been warned.
Bear in mind that this is a rumor, and has not been confirmed however it doesseem highly likely to be true. The only way to combat this would really be by using stealth firmware, if itˋs going to be developed any time soon.
For those buying new Nintendo DS products, you may as well get the DSi XL, if you want to play those "backups".
