Microsoft announced the availability of a new location based Windows Phone app on Thursday.

The application, named “we’re in” and built by the Bing team, is exclusively available to Windows Phone users. We’re in allows users to join a virtual group and share their location. The app is designed to remove the time and frustration around arranging to meet friends. We’re in will allow friends to automatically share their location so other friends will know when each other are running late to meet at a mall or for dinner.

“We’ve made We’re In super simple to use,” says Microsoft’s Bing program manager Philomena Lobo. We’re in users simply invite their friends using their existing mobile number. The app can then create a virtual meeting that shares each others location and expires at the end of the meeting. We’re in also features a map to locate friends on-the-go. “As each of your friends joins you, their locations appear on the map,” explains Lobo. “If you need to you can pan, pinch and stretch the map to see more or fewer of them. Everyone that joins can see everyone else’s location.”

The application is available immediately for Windows Phone 7 users in the United States. “We’re working on bringing this app to more devices,” in the future promises the Bing mobile team.