The Washington Wizards on Wednesday acquired center Emeka Okafor and forward Trevor Ariza from the New Orleans Hornets for forward Rashard Lewis and the 46th pick in next week’s draft. Trades usually aren’t made during the playoffs as teams are inclined to wait until the draft and free agency to start making moves in advance of next season. As far as postseason trades go, this is a pretty big one, rivaling the Chris Webber deal in May 1998. The Wizards were fleeced