Make your own Ghost Map

From Paul Kedrosky: Twitter for Hypochondriacs:

Who is sick? is a clever idea, and similar in many ways to my 'what's going around?' idea. It allows people with symptoms of something or another -- bloody stool! sniffles! cough! muscle ache! -- to add their location and symptoms to a map.

Why clever? Because it is the data-rich beginnings of grassroots epidemiology via capturing the kinds of conversations that usually only happen in doctors' offices. You, know, 'You have a cold. That's going around'.

Gee, it's like a modern, collaborative version of The Ghost Map.