this is a great idea...if GOOD or you Rosie are looking for a unique way to integrate this information into a broader platform with wider exposure...talk to Airbnb. They have Neighborhood Guides on their site that are quite one dimensional. This seems to compliment that quite well and would be a way to tie in a social impact or awareness piece to the airbnb site.
just an idea. I like the discussion so far...now I just need the $$ to visit some of these places.