I think your numbers are a bit off.
As of now, they've got Datsyuk, Zetterberg, Franzen, Filppula, Cleary, Rafalski, Stuart, and Kronwall on the books for 2011/2012. Together that's a little over 35 million. I can't imagine him still being around, but if Holmstrom still wants to play, they'll re-sign him. Lidstrom will be gone. They're going to lock up Eaves and Miller. They're most likely going to re-sign Bertuzzi. Lilja is too valuable of a penalty killer to not re-sign. Ericsson's too young to give up on, they'll re-sign him. Howard will be due up soon too. There is a high likelihood that Hudler will be coming back, if not after this season, after next. They've got a couple prospects on the horizon who have to be on the NHL team starting next year. And like you said, they'll probably make a move or two in free agency this year.
Just don't see anyway they could fit in another big contract like Thornton (even if he took a paycut).