I've been thinking more and more about a Web site for my neighborhood since I have a son and an investment in the community. Walking the dog this morning, I saw a poster for a lost cat one street down and two more for yard sales in the area. Those would be perfect things to announce. Also, houses that are for sale (who is moving), and new neighbors who have recently moved in.
I need to find if there are neighborhood associations here. I think there's one for Broad St. - my street - but the various things are in a several block radius. I might do the McIntire Historic District which has several more streets.
Then there's the neighborhood watch system, other community events and announcements, resources like notes on which weeks are recycling collection or lawn waste collection, and an email list for other alerts and discussion.
Anything I'm missing? Think of the most outrageous use of tech for a neighborhood.