I don't see Halladay traded at all. Toronto's asking WAYYYY too much to get Halladay for a year and a half. I really thought they had a deal with Texas last night, but the Rangers won't give up Derek Holland, and wants Toronto to pay some of Halladay's contract.
As for the Yankees, I really thought they were frontrunners for Jarrod Washburn, until Detroit got him. I keep seeing rumors that Bronson Arroyo has been traded to the Yankees, but I don't think they're true.
Nick Johnson to the Marlins looks very possible right now. The Marlins have offered Ryan Tucker and a minor leaguer.
If Boston gets Halladay, they can't get V-Mart, and Boston really needs hitting. I don't think the Sox would give up Buchholz either to get Halladay.
The Dodgers have already got George Sherrill, and I think they're done, but if they were to get Halladay, they would be my favorites to win the World Series.
If Texas were to get Halladay, they would probably be in a battle with Boston for the Wild Card, or a battle with Anaheim for the West. The Rangers need hitting, and I don't think they would be willing to give up the prospects they have.
Eventually, I think Hallladay will stay put in Toronto becuase the asking price is way too high.