Montreal is a little desperate, no mistake. Then again, you have to consider just what offensive D-man are available. There's J-Bo, J-Bo, and J-Bo, and twenty-nine teams gunning for him. As Montreal is in deep trouble ATM, it can't afford a "maybe" that won't show up for sure until march. Better a weaker but sure trade than a bigger but costly one.
Meanwhile, Montreal has sent Sergei Kostitsyn back to party-less Ontario and Hamilton, and away from having a bad influence on Chris Higgins and Carey Price, and put Kovy off the ice for two games.
A lot of people suspect a bigger trade in the making, probably involving someone like Markov.