Thing I read was Shump + Amare for Rondo + Courtney Lee + x. I think Rondo + Wallace is more likely... Wallace has the extra year over Amare, which gives Boston earlier flexibility in their rebuild.
Rondo + Humphries + Lee for Amare + Shump would work as well.
But honestly? If I'm Boston I don't trade Rondo for Shump only to give away some salaries. I wait for the return and try to rebuild his value. Same way that Orlando can pretty much get sth real back for Afflalo if he continues to strive on both ends of the floor.