Guys they updated their site with info on how you can get it to play nds games! No need to get a separate card for that if you won.
Edit: They haven't released the .firm yet, but they will within the next few days
Edit 2: Would someone potentially be able use this to get ntrboot onto the r4i-sdhc once they release the firm.
I saw this news this morning, good that they are doing this, now the flashcart is more than worth it at this point with this development.