I don't really see the upside for Washington in this trade, they would then have 4 pf's fighting over minutes and Okafor is their only guy capable of playing center, Nene is probably a better fit for their team.
Also it doesn't really solve our depth problem for bigs, and i doubt it's enough to put us over the top. Not enough to give up our best asset, even if he is injured. He will be more valuable next year either on the court or as a trade chip.