Since you didn't actually post the scenarios, I'll do it so people can get through the thread easier
Scenario 1: Chris Duhon and David Lee to Washington for Etan Thomas, Mike James and the #5
I don't know if the Wiz are willing to blow their number 5 on Lee, but with rumors that Steph may sign in Washington, I think this deal probably won't go through.
Scenario 2: David Lee and Nate Robinson to Portland for Rudy Fernandez, Steve Blake, Travis Outlaw, a trade exception (someone like Ike Diogu), the 24th pick this year, the 32nd pick this year and the Blazers' first rounder lotto protected in 2011.
Seems like the Blazers would be giving up a lot here, I don't think this is very likely.
Scenario 3: David Lee and the Knicks' 2 trade exceptions in Mardy Collins and Renaldo Balkman to New Jersey for Bobby Simmons, Chris Douglas-Roberts, Sean Williams and the #15 this year.
I like the idea of trading for draft picks, but I don't think that this is a very good trade at all...
All three scenarios are pretty bad in my opinion, I'd consider Scenario 1 over all of them though.