There's rumors all over the place about the Cavs going after guys like Troy Murphy, Antwan Jamison, and Andre Iguodala. Most of the trade scenarios involve them giving up Z. I also think if Z gets moved, the destination team may very well buy him out. I think if that happens, the C's should attempt to sign him. After a backup point guard, our biggest need is a big off the bench and he would fill that need nicely.
Also, he could get back at the Cavs for dumping him. Imagine, the guy spends 12 years with them and they're ready to axe him for a title. A very classless franchise if you ask me. If anyone on that team deserves a chance at a ring, it's Z. Maybe he can get one over here!