Shelden will definately be there at 5 if they want him, I think they were trying to stir things up. However, I don't see a better choice there for them. They need a big man, not some long SF with no handles or post game like Aldridge even if they could get him.
But hey I wouldn't think they were doing the wrong thing if they took the Celtics idea, and traded their pick for Telfair and something else. They need a pg, just as much as they need a C/Pf