

I will just list some of the top social media monitors. These technologies are emerging to help companies keep track of the conversations exploding online. This entry will be very helpful as a guide for digital media people who are being asked by their clients more and more about how to monitor the conversations going on online world.
Nielsen Buzz Metrics; uncovers and integrates data-driven insights culled from nearly 100 million blogs, social networks, groups, and boards.
Cymfony TNS; a division of TNS Media Group provides solutions to professionals in marketing, research, and communications. Their services range from creating a social media strategy to developing social media analysis or monitoring blogs.
Biz360; measures and analyzes news media and consumer opinion information from a vast amount of traditional and social media sources.
Visible Technologies; tracks social media conversations, also participates in these discussions by placing the messages. Visible Technologjes has a strategic partnership with WWP.
Webtrends Social Measurement; offers a self-service platform with an interface ranging from monitoring millions of blogs, video-sharing sites and other social media venues, segmenting and sorting any conversation any number of ways, integrating keywords that appear prominently within the tag clouds, viewing text, videos, pictures from social media on the interface. All and more of these powered by Radian6.
Radian6; another tool that helps companies to listen, measure and engage in social media.
Scoutlabs; monitors and sorts by what/who is most important to pay attention to, monitor important Tweets, blogs, photos and videos all in one place, filter by negative or positive to read rants and raves, compare buzz for you and the competition, see quotes on a very well designed dashboard.
Backtype; a real-time conversational search engine.
Filtrbox; has a partnership with Radian6.
And a Turkish company, Buzzical Olcumleme. The only thing I know about them, they measured the latest Gittigidiyor.com viral campaign.
*http://www.readwriteweb.com/archives/whats_next_in_social_media_monitoring.php