New Map App, My Friends, shows you where your Facebook friends are

MyFriends Want to see where your Facebook friends are in the World? Now you can with the new My Friends map App! This map app uses Facebook APIs to pull in your friends from Facebook (only those who have listed a “Current City” in their profile).

Just load the app, log in via Facebook Connect and allow the app the permissions it asks for and the app will pull them right into the map (including profile picture).
Clicking their picture will show you their picture and status. You can even write directly on someone’s Facebook wall from within in Bing Maps.
write on wall 
More info on this map app is available here.