The camera is initially for a game called Face Training, which is an facial exercise game/tool, that promises to improve your looks with a spot of gurning (not that the word ‘gurning’ was used – the word ‘facening’ was actually referred to). The camera itself slots into the DS’s GBA slot and comes with a stand so you can go hands free with your facials.
Apart form that, there’s no details of any other camera functionality, but we’ll doubtless hear more before the August 2nd launch date. The price for the game and camera bundle is the equivalent of £20. I somehow doubt it will be priced at this point in the UK if the camera combo makes it over.