Adrian's baby EveryBlock launched today, offering locative neighborhood information for San Francisco, Chicago, and New York. They include things like alcohol permits, restaurant inspection reports, craigslist missed connections, filming permits, police and fire activity. No SF crime yet, but that's something we may be able to help with.
I love a site that has the gumption to roll their own maps:
A challenge for EveryBlock: make a write API for other towns.