If the Knicks and Rockets are looking to make this happen, Boston could be a third team to help with financials.
http://basketball.realgm.com/wiretap/233910/Broussard-Knicks-Rockets-Sign-And-Trade-Of-Carmelo-For-Harden-PossibleBostonGet: Chandler Parsons, Jeremy Lin, Omer Asik, Iman Shumpert
Give: Bogans, Faverani, 2014 #17 pick
New York KnicksGet: Harden, #17
Give: Anthony, Shumpert
HoustonGet: Anthony, Bogans (immediately cut), Faverani
Give: Harden
http://espn.go.com/nba/tradeMachine?tradeId=ptymp39This leaves enough room for the Rockets to sign Lebron in the off season and form a big three of Howard, James, Anthony.
Knicks get a star and a draft pick. Obviously better than losing Anthony for nothing in free agency.
Celtics get depth at every position. They can use trade exceptions on all but one of the incoming players, so Lin's 8.4 million is the only financial hit during the trade. They could put out a possible roster before attacking free agency of:
PG: Rondo/Lin/Pressey
SG: Smart?/Shumpert
SF: Green/Parsons/Wallace
PF: Bass/Sully
C: Asik/Olynyk/