Seriously, how am I supposed to save lives in Trauma Center while only being able to use one hand to operate (the other holding the DS, obviously)? This device will hold the DS and mount it anywhere your heart desires. Then you are free to use both hands to do all of the gaming you can handle. This mount is made by Playstand and goes for a very cheap $10.

A third hand holding the Nintendo DS bottoms up [Gearfuse]