Lately, Twitter has been getting a lot of buzz in the internet marketing community, as the microblogging site celebrated its fifth birthday with some major milestones that suggest it offers access to an ever-growing pool of online consumers. Now, the Twitter chatter takes a new turn as MediaPost reports that the site is testing geotargeted Tweets.

The source reports that Twitter is testing a feature that targets Promoted Accounts and Promoted Tweets according to specific metro regions in the United States. This feature could come in handy in reaching the right users, as Brafton has reported that Twitter is seeing a surge in user information updates that specify location.

Officials seem to be keeping tight lips about the geotargeting service, declining to comment on specifics. However, Twitter spokesperson Matt Graves told MediaPost, “as with all of our advertising efforts, we are watching this test closely and will use feedback from advertisers and Twitter users to fine-tune and iterate on the feature.”

If the new features becomes successful,it may help push the site's ad revenue for 2011 to eMarketer's anticipated $150 million.