Portland would take him probably for the 11th. The need a center badly.
Dallas if the cant get any big names would be a great fit with nowitzki.
These two are going to be laughed at, as that leaves their front courts weak defensively. But Dirk and Aldridge have outside shots, which would give Jefferson more space to work with. If Jefferson can't get a spot on the allstar team as a 20/10 guy on the Jazz, I can't imagine him not be able to make it with what either of those two situations would provide him to work with.
Who would we get back? With Portland it's easy(Wes). But who would we want back from Dallas? Beaubois and the Shawn Marion Albatross?