I was just thinking that if Toronto knows Bosh is gone, if the might help him leave. I'm not sure Cleveland really has the pieces that say Chicago does, but Cleveland could certainly give them almost all expiring contracts and a nice young player like Hickson.
Cleveland would have to send somewhere in the neighborhood of 15 million to Toronto to get Bosh back. West, Moon, Parker, Hickson, and Powe would do it (obviously the Cavs would also need to send some draft picks and probably cash). If Toronto wanted the Cavs to take on more salary, the Cavs could potentially sign and trade Big Z or Shaq on a one year deal and send them to Toronto or send them Varejao or Boobie, if the Raptors actually wanted either of them (maybe toronto is done with Hedo or Calderon, for example).
Granted I don't think this is likely at all, but the thought did cross my mind.