From Political Wire:
Sen. Joe Lieberman (D-CT) "has relinquished his position as co-chairman of the Senate Centrist Coalition, halting talks with co-chairwoman Sen. Olympia Snowe (R-ME) over the future of the organization in favor of creating his own bipartisan group with Sen. Lamar Alexander (R-TN)," according to Roll Call."
Lieberman's group will be bringing senators together in social settings, according to a letter published in a Tennessee newspaper.
The purpose of the group is to create an opportunity for Senators to know one another better across party lines so that we can identify common interests and work on issues that are important to our country.
Snowe and Landrieu will be working on reaching out to "non-ideological" centrists, according to the Roll Call article. I assume that Lieberman is not one of these?
Centrist Split in the Senate. Political Wire. http://politicalwire.com/archives/2006/12/21/centrist_split_in_the_senate.html
Lieberman, Alexander Organize Bipartisan Members Group." The Chattanoogan 20 December, 2006.