I'd be down for Melo coming to Boston, if we could somehow get him (obviously while keeping Rondo). I definitely see a contender to be built around a Rondo/Melo pairing. Add a legit big and a couple of good '3 & D' wings, and you'd be close.
Melo is sill salvageable. As a few others have said, he needs to be surrounded by the right teammates. The one year Denver had a good mix of complementary players, they gave the (eventual) champion Lakers their toughest test (WCF). The reality is, Melo hasn't really been surrounded by 'championship worthy' teammates very often. Chandler and Shumpert are really the only two players currently on the Knicks I see as being good fits with Melo. JR Smith is not, Felton is not, Bargs is not. Of course, the real problem with the Knicks is Amare. Things were looking pretty good that 1st year, but then the back and knee injuries took their toll on Amare and submarined any chance the Knicks were ever going to be legit contenders, as presently constructed.
The question is, does Melo really want this, or will he be content to stay in NY, and just continue to put up hollow numbers for a flawed team? NY's management is terrible, and it likely isn't ever going to work there for him.