If you have not used it before, Bing Venue Maps provides indoor maps for large buildings such as malls. Indoor map information contains store location, but also ATM, restrooms and other things that people may search for in such places.
Of course, 2700 additional venues worldwide isn’t much and chances are that you are not going to use this right away. But just like maps in the early days, this effort will increasingly become more complete, and therefore useful. By then, we can hope that indoor-location will be available on handset, which is what we’re really excited about. If you want to check at venues, just head to the Bing Venue Maps site and note that this is also available to Windows Phone 7.5 users.