Well just found this today Apparently Nintendo Japan is releasing a slot 1 media device called the "DS Vision" With this device DS owners can play content downloaded from a micro sd card from the Nintendo website. http://uk.ds.ign.com/articles/838/838522p1.html >
But then,why are they the second most important company in Japan? Well,prolly because they can roll in clueless parents who don't know shit about emu-testing,all of that and bought and individual cartridge which if you bought 3~5,you would have the DS! $_$ Bah-ling!
Ten bucks says that it'll be far, far more convenient to use a flashcart due to compatibility issues and shoddy DRM on the nintendo official thing.