Twitter announced that Twitter Places is now available on Twitter.com and mobile.twiter.com. This is a feature that lets you tag tweets with specific places by sharing your location.

Some users had access to location-sharing features back in March, but it appears that it is being rolled out on a massive scale now. Over the next week, Twitter will launch Twitter Places in 65 countries. The company is also working on brining the feature to its mobile apps for iPhone, Android, and Blackberry.

"If you're like everyone at the Twitter office, you're going crazy about the World Cup," says Twitter's Othman Laraki. "When turning to Twitter to keep up with the current game, it helps to know where a Tweet is coming from—is that person watching the game on TV or is he actually in the stadium?"

Twitter Places comes with Foursquare and Gowalla integration, which automatically gives these two services an advantage over competitors in the "check-in" space.

"Many Foursquare and Gowalla users publish check-ins to Twitter," says Laraki. "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."

Twitter is also releasing API functionality for Twitter Places, so developers can integrate Twitter Places into their apps. In addition, you can add location to your tweets from any browser.