In the Friday’s edition of ‘Time’ magazine:

“Independent” Sen. Joe Liebeman receives a mini-profile titled “What Joe Wants,” a key question since he is “the Senate’s one-man tipping point.” Republicans, the magazine says, are “courting him” and Lieberman “has been indulging in some fairly immodest poltical footsie.”
Lieberman calls jumping to the Republican side, and tilting the Senate, “a remote possibility,” which means there’s at least a chance of that. Time seems to push Lieberman in this direction, as the article concludes: “Lieberman’s GOP flirtation has its risks–and a time limit….The longer he waits to capitalize on his moment, the greater the danger that he’ll be tagged as one of those politicians for whom having power is more important than using it.”

(via)
I don’t believe it, I don’t believe he’ll side with the Republicans. Everyone thought that Lincoln Chafee would move to where his heart was but he never did. I suspect Lieberman will stay where he is.
Kos really helped Lieberman more than he hurt him, Lieberman knows that the Democrats need him more than he needs them. It frees you to vote the way that you want and to be in a position to call the shots.