This was discussed in
here.
If you're going to view things like this (which I think is more silly than anything else), you need to look at what we have now, versus our assets at the time. Thus, we didn't receive Jeff Green; we already had him with the #5 pick in the draft.
I think this is how it breaks down, although I could have missed something:
Boston trades: Perk, Walker, House, Wally, Giddens, 2.7 years of Jeff Green, 2 years of Delonte, 2008 2nd rounder (?)
Boston receives: Ray Allen, BBD, Kristic, 1 year of Nate, Clippers #1