Twitter to add revenue-making product this year

Twitter Inc., the Web site that lets people post 140-character messages, plans to add services for businesses that will generate revenue in the fourth quarter, co- founder Biz Stone said.

The products might include an "analytics dashboard" that would help companies monitor Tweets about their business, or verified corporate accounts on Twitter, Stone told reporters today at an event in Mexico City.

Twitter, based in San Francisco, is seeking ways to generate sales after reaching 20.1 million U.S. users in June, according to ComScore Inc. of Reston, Virginia. Companies including Comcast Corp. use the service to communicate with customers and may be willing to pay for added features, Stone said.

The new services would probably be offered on a limited basis at first, Stone said. He didn't say how much they will cost or how much revenue they could generate.