Wow, this is a pretty cool setup right here. A professional photographer was sick of lugging his laptop around to photo shoots, so he rigged up his Nintendo DS and custom-coded some software to do the heavy lifting instead. He even leveraged the microphone on the DS to make his camera snap photos when triggered by sound.
It also does other stuff that I don’t understand like providing unlimited shot brackets, acting as a very-precise intervalometer, and working in bulb-mode. He’s thinking of selling kits for $100 (DS not included), which seems like a pretty good deal.