SpotCrime is a mashup that plots recent criminal activity onto Google Maps, allowing users to shy away from seedier parts of towns they may not be familiar with. The company has offered a website for a few months now, and has just introduced an iPhone version (annoyingly, you have to manually navigate to Crimes are depicted as small icons according to the type of incident, and users can filter crimes over a certain date range or time period. Clicking on an icon brings up more detailed information (when available).

Full story: techcrunch.com