Roark Johnson's "Stranger A Day 2007."
Great stuff—well worth a look. I hope it's going to continue.
(Just as an aside, this may be one project that might easier to do with a view camera than a digital one. It might be easier to persuade strangers to pose for a big, non-moving, serious-looking camera on a tripod than it would be to enlist their cooperation with a dinky digicam.)
Roark Johnson is a commercial and editorial photographer from Chicago. You can see more of his work at his website, including lots o' shiny happy commercial portraits and a nice series of school kids.
And finally, if you don't already know (I'm apparently one of the last people on Earth to find out about this project), here's a link to the original Stranger A Day.
Posted by: MIKE JOHNSTON, with thanks to Charlie D. and to Kathryn