Put your social project on the map. Or, use those already listed to find something new in an area you care about. The OpenAction Map is a well-done full-screen map mashup that shows positive work based on the location that is being impacted.
If you've done much searching for locations using web tools--and who hasn't by now--you've likely discovered some errors along the way. Sometimes a map marker is down the street from the actual location. Geocoding, the process of converting an address to latitude/longitude coordinates, can be an inexact science. A new geocoding service from MapQuest (our MapQuest API profile) aims to help you improve where you place that marker with Address Point Data.