Not a lot of writing, just telling it shortly:
1. Ray Allen <---> Mike Dunleavy, T.J. Ford
The Celtics would get a back-up PG --> Don't have to sign the unproductive Marbury
The Pacers would get 19 million more cap-space to rebuild in 2010
2. Eddie House, Tony Allen, Brian Scalabrine <---> Sergio Rodriguez, Joel Pryzbilla
The Celtics would get a good and most of all defending back-up C + they would get Sergio (Re-Sign Marbury in this scenario, because Rodriguez isn't experienced enough to play big (10-15) minutes in the playoffs, let him develope)
The Blazers would get 11 million more cap-space at 2010 (Brandon Roy + 11-million-star would be nice to Portland)