A lot of people seem to misunderstand here...This has got NOTHING to do with getting flashcarts in DSi Mode. This uses a flashcard in DS mode to install some code on the WiFi chip (in unused space), and then uses a DSi mode game to load that code via an already released exploit. All this means is you can now load homebrew on a DSi in DSi mode, where before you could not. I am a little confused though as to whether current DS homebrew will work or not...if not, this is currently pointless, until someone makes some DSi homebrew.
This development doesn't mean you can magically access the cameras from your SCDS2
EDIT: Also, in theory I guess it may be possible to replace the DSi compatible flashcard with a DS mode game, e.g. Fifa 09, which was already (privately) exploited, and use it to install the code on the WiFi chip instead. But I dunno if the save on that game would be large enough or not.