Nintendo DS

There been about a million different little add-ons for the Game Boy Advance (like the GBA Movie Player, the iCard, and a GPS attachment, so this shouldn't come as any surprise, but Agatsuma Entertainment say that they're coming out with TV tuner attachment for the new Nintendo DS (which is now just a couple of days away) that will pop into the Game Boy Advance catridge slot on the bottom of the console and run on its own set of batteries.