FOX Sports reports that T.O. is a cowboy. --
http://msn.foxsports.com/nfl/story/5424172
The article says that T.O. wants to work on his attitude and put his past problems behind him. Some of it might have to do with the possibilities that there are behavioral bonuses listed in his contract.
If T.O. puts his past behind him, grows as a player and actually works well with his teammates, coach and organization, this is a great signing for the Cowboys. It will give them someone to throw to and is one of the key pieces that Dallas is missing. Time will tell, though.