http://blogs.forbes.com/alexknapp/2011/05/13/x-prize-and-qualcomm-announce-10-million-tricorder-prize/
You'll have to excuse me if this is cock-repost...couldn't find the thread here if there's one preceding. Anyway, damn me if this isn't wackadoo and awesome at the same time. NOT that I'd want it to take the place of an actual DOCTOR making the diagnoses, but it's kinda cool as a tool to help out.