Twitter added Foursquare integration
The possibility of adding a location to tweets is not new, but rather this functionality will be extended with Foursquare integration.
Currently you can add information about the city or neighborhood from which tweet, but after the official debut of the new functionality, you can choose any place in Foursquare as location of your tweets. The mention of specific place will make its presence location on Twitter much more useful, especially if you want to read tweets from a particular location. We still don’t know when we will be able to take advantage of Foursquare integration, but on Twitter reported that the update is coming soon.