Cliff Fletcher has reportedly asked Mats Sundin for a list of teams he'd play for if he were to waive his no-trade clause.
http://www.tsn.ca/nhl/news_story/?ID=230283
I do think he's going to move, but I doubt it will be very far. Mats is 37 years old and has settled in quite well in the Toronto area. I don't think he's going to want to move very far, and he probably wants to move to a contending team, if he's going to move at all.
So you have either Ottawa or Montreal. My guess (hope) is Montreal.