Twitter users can now add their current location to their tweets. The micro-blogging service on Thursday activated an optional new feature that appends geographical information to your posts.

Once you opt-in, Twitter adds your location to your tweets. Note the region circled in red:

Why the new feature? "A recent burst of interest in location sharing applications, games, and services has many Twitter users excited about appending geographic data to some of their tweets," writes Twitter co-founder Biz Stone.

Biz Stone from Twitter has announced that the service will soon get a new feature in its API: The capability to optionally put geolocation data into tweets. Currently, geo-focused apps like Foursquare must hack location data into updates by linking them to Web pages. Once Twitter lets developers embed geo into tweets themselves, a new and interesting world for developers will likely open up.

As Stone says in his post, "For example, with accurate, tweet-level location data you could switch from reading the tweets of accounts you.

Listen up, San Francisco residents. Is there a leaky fire hydrant on the corner? A huge pothole on your street? Unsightly graffiti on your building? Starting today, you can contact city 311 officials via Twitter.

Mayor Gavin Newsom and Twitter co-founder Biz Stone on Tuesday announced that the city's non-emergency 311 information service will accept inquiries and complaints via the ubiquitous micro-blogging service.

Apple (NSDQ: AAPL) has nearly $29 billion of cash on hand, a hoard that only exceeds one tech company?Cisco Systems (NSDQ: CSCO), reports Reuters. With that kind of capital in the bank, it's no wonder that buy-out rumors are running rampant.

At this stage, the rumors seem highly unlikely. The most ridiculous, according to Kara Swisher of All Things D, is Apple buying Twitter. She believes it to be untrue because both Twitter co-founders, Evan Williams and Biz Stone, are in New York today to attend the 2009 "Time 100" dinner.

A prolific Internet worm pummeled microblogging site Twitter over the weekend in four separate attacks, resulting in thousands of compromised accounts.The worm, a computer program designed to propagate and infect users over a network, targeted the San Francisco-based Twitter site in a series of four attacks from Saturday morning until early Monday morning.

Twitter co-founder Biz Stone said in a company blog that the attackers initially created four accounts that rapidly spread the worm over the site early Saturday morning. Stone said that Twitter's security team was deployed later that morning to address the threat, which had compromised about 90 accounts by 11 a.m.