Technically an independent, Sanders caucuses with the Dems. And doesn't hedge (via email):

"To reward Senator Lieberman with a major committee chairmanship would be a slap in the face of millions of Americans who worked tirelessly for Barack Obama and who want to see real change in our country," Sanders said.

"Appointing someone to a major post who led the opposition to everything we are fighting for is not `change we can believe in.' I very much hope that Senator Lieberman stays in the Democratic caucus and is successful in regaining the confidence of those whom he has disappointed.  This is not a time, however, in which he should be rewarded with a major committee chairmanship."

Sanders commented after Leahy, chairman of the Senate Judiciary Committee, responded to a question about Lieberman during an appearance on the Vermont Public Radio program "Vermont Edition."

The Village can wring their hands, but relieving Joe of his chairmanship is a meaningful, important remedy. Maybe people are still in campaign mode, but not everything is one-dimensional political theater. This is governance.

Update [2008-11-14 17:53:18 by Josh Orton]: Greg Sargent, who's been right on top of this, makes a great point:

On some of the most pressing issues we face, Lieberman simply doesn't share the ideas or values of the Democratic Party. And given his performance as Homeland Security chair, Lieberman foes think stripping Lieberman of his post is, you know, better for the country. Some seem incapable of imagining that the push to oust Lieberman could be about anything other than revenge or that anyone could possibly oppose Lieberman simply because of his ideas, values, and governmental failures.