If you saw our earlier coverage of '4th & Mayor' this week, the alternative Foursquare app, you'll have noticed that version 3.0 for Mango was slated for release. That day is now upon us and you can go ahead and grab the latest and greatest version of that app in the Marketplace.
Not only does v3.0 feature new fast-app switching, but all sorts of new features and enhancements, most of which folks should really enjoy (we dig the friend-mapping and secondary Live Tile for quick checkin). To see the full changelog, see our earlier story. To just grab the free app, head here to the Marketplace. Thanks, Imran K., for the heads up!