Rob Walker tells Boing Boing,
I started a Flickr pool with some photos I took of the MLK Blvd in New Orleans a couple years ago. The idea is to try to encourage people in other cities to add photos of MLK Blvds (or Avenues or Streets) wherever they are. There's now some Chicago, Bogalusa (LA), Greenville (MS), Jersey City, a little Austin & SF. I also added some more recent MLK Blvd photos from a post-Katrina visit to New Orleans.