They must have come to some long term agreement with Williams, right? Otherwise, they're just really dumb.
Firstly, no. They didn't.
Secondly, why 'dumb'? Guy has a year and a half left on his contract. And I have no doubts that Prokhorov can be VERY persuasive.
And if it works for them... they got an elite point for a guy you'd describe as "pretty good" and a prospect, rather than trade half the team. Seems like a very good roll of the dice for my money.
http://with-malice.com/ - The half-crazed ramblings of a Lakers fanatic in Japan