The long discussed integration of location services and Twitter has gone live.
…you can tag Tweets with specific places, including all World Cup stadiums in South Africa, and create new Twitter Places. You can also click a Twitter Place within a Tweet to see recent Tweets from a particular location. Try it out during the next match—you will be able to see Tweets coming from the stadium.
Beyond opening the API up so developers can include the Twitter Places functionality and providing support for more browsers they have also integrated the two most popular location services:
Foursquare and Gowalla integration: Many Foursquare and Gowalla users publish check-ins to Twitter. Location is a key component of these Tweets, so we worked closely with both companies to associate a Twitter Place with Tweets generated by these services. This means that if you click on a Twitter Place, such as "Ritual Roasters," you will see standard Tweets and check-ins from Foursquare and Gowalla.