Ok so the first DSi only game was just released (System Flaw, a shovelware game). And alot of people are thinking of taking it and editing it to make it a DSi flashcart. But that won't do anything. Here's me talking on #dsidev with a few other people (the irc network is efnet). Basically DSi Only games are signed with the common key like DSi Ware. So if you try to run DSi homebrew through a DSi flashcart the DSi will reject it because it's not signed. Thus meaning the only thing DSi flashcarts could do (until we get the common key, which probably won't be released because Team Twiizers would probably want to prevent DSi flashcarts from succeeding) is play DSi enhanced and dsi only games and so far that's just shovelware.