Seriously though, you could collate *reasonable* information about someone's health pretty easily. It wouldn't diagnose illnesses, or do most things a "doctor" would - but in terms of general "health" (title of the game/app), I think it could do a pretty decent job.
Did Kinetic have a heart rate or pulse monitor? It would be pretty easy to add something to the Wiimote for this, and just plug it in.
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I think this will not only sell through the roof (easy for kids to convince parents of a purchase - or the other way around?), but will sell a lot of systems. Another killer-app, in the Wii Sports category...?
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Nocturnal is helping companies get cheaper game ratings in Australia:
Wii code: 2263 4706 2910 1099