Another in a long string of recent Google Maps hacks, Rising Concepts has created a service called Frapper! that provides groups of people with similar interests a way to share their general location.

The collaborative map site is basically a database that stores course map information (zip codes and international city names) along with an annotation (such as your name, picture, and a "shoutout"). When you bring up their map page, it overlays the points onto Google Maps and now you have a map of your group, or your interest.

The purposes of the maps range from just communities of people who have gotten to know each other online to organizations for pet rescue and a list of XBox 360 Kiosks