At North Branch Correctional Institution, prison Warden John A. Rowley mentioned that the state-of-the-art touch-screen system that the prison uses to control the population is, apparently, very similar to that of the DS. He commented that "Nintendo was a great tool to train today's officers." We couldn't agree more, since the DS is not only a great handheld system for gaming, but also a cheap way to introduce folks to the interface of a touch-screen, not to mention how to effectively use a stylus.
So, while the Warden comments that Nintendo helped train his guards, we think the system can go further. It can train grandparents on how to use a PDA (or you can turn it into one for them), among other things. What a great little system!