From Jordan Bastian:
A report on FOXSports.com noted that the Rays have talked to the Jays about Halladay, and the clubs have discussed including a third team. Tampa Bay could reportedly offer pitcher Wade Davis and outfielder B.J. Upton, and Toronto might consider flipping Upton to another club as part of the trade.
Yeah I'd take that one right away, not sure that I'd want to flip Upton, he would be someone I'd want to keep.
I guess I could note that Peter Gammons says the Rays have 'flatly denied' this rumor.