TwitterHawk

Marketing Tool

Creator: Chris Duell

www.twitterhawk.com

Twitter is being used by marketers in many ways, but perhaps the most aggressive method involves a service called TwitterHawk. The Web-based tool lets any company send automatic Twitter messages to people on the microblogging site who mention a certain keyword, such as "coffee," within a certain geographic area. The site charges marketers five cents for each ad they send.

See also: Radian6 (www.radian6.com), twtQpon (twtqpon.com), and twitzu (www.twitzu.com)