I believe Golden State regrets giving David Lee such a huge contract. In fact, I heard rumors (just rumors) that they were going to amnesty him. We could offer them a reset.
This is a move that would seriously improve our chances of getting somewhere in the playoffs this year since Lee is hardwired to crash the boards. He's not known for playing defense but O'Neal can barely tie his own shoes at this point. Secondly, even with Lee's contract, the Celts should still be under the cap for 2012, which means they can use full MLE on someone. I'm of the belief that we're not getting a max contract guy anyway. So when KG checks out, we'll still have Rondo, full MLE (a shooting guard probably - I doubt we'll be able to afford any big guys worth having), Paul Pierce, Jeff Green, Brandon Bass and David Lee to work with. Definitely a playoff team.
What does Golden State get out of this? A do-over. Without Lee on the books, they'll have a shot at a max contract player in 2012. Furthermore, I have a feeling they'll try to flip Monta Ellis for a power forward/center by the time the trade deadline rolls around. They've got Brandon Rush and Klay Thompson behind him at shooting guard - both recently acquired. If they can get a big to replace Lee, the trade becomes sort of a no-brainer, unless of course they can get a better package from someone else. But who else would be willing to take on Lee's contract? Ainge has always been a David Lee fan... me too by the way.