A New Hampshire marketing guy built IncidentLog.com by data-mining press releases from more than 60 police departments nationwide, and then marrying them with the Google Maps API. In L.A., incidentlog pulls LAPD releases.
The L.A. map is updated weekly, so it might not have yesterday's brutal baseball-bat beatings of two Skid Row denizens even if a press release is written, and the database for L.A. is about a month deep. But the map does pinpoint a dozen-and-a-half homicides throughout the LAPD's jurisdiction.
Here's some background from the creator, Scott Brodsky:
I put this website together myself in my spare time, as a hobby. My real job is in the marketing industry.
I am from Londonderry NH. I am a graduate with a B.S. in Computer Science. I started this project back in February working evenings and weekends.
I am hoping to build a site large enough that it would provide a resource to buyers/movers looking into moving into new neighborhoods who would want a place where they can investigate quickly and easily before making a major purchase/move.
I am open to options regarding issues such as partners,sponsors, etc, but, figure I probably need to build a customer/user-base for the first few years before anyone would take it serious.