Twitter has now launched the geotagging API, or application programming interface, that it .
Users now have the option to opt-in to geolocation by clicking a box in their settings menu, according to Twitter. For now, the company said, the impact of geotagging will be in third-party apps. Users won't see a difference to Twitter.com just yet.
Twitter contends that including a user's location when he or she tweets could significantly add to its microblogging service. The company wrote in a blog post that the new feature should allow users to "better focus in on local conversations."
Several third-party tools, including Birdfeed, Seesmic Web, and Twittelator Pro are already supporting geolocation, Twitter said. It should be interesting to see how other developers will incorporate location-based information into their apps.