There was a personal site by a guy named Rademacher (sp?) that had apartments on craigslist in San Francisco overlayed on google maps. IIRC, it was a solution

There was a personal site by a guy named Rademacher (sp?) that had apartments on craigslist in San Francisco overlayed on google maps. IIRC, it was a solution to a pet peeve that became really popular. He later formed a company with some other GIS-in-the-browser people that quickly got acquhired by some big tech corp.