I too have been pleasantly surprised with Williams' play of late.
But, let's not get too far ahead of ourselves. Williams is 6' 9", listed at 250 pounds, and doesn't have a whole lot of lift. I'm fine with him as a backup PF, but I think the team needs another legit 7-footer to back up Sheed at the C, especially considering that our road to the Finals will likely require us beating both Orlando and Cleveland in the playoffs.
I'd love to turn some of our expiring money into a veteran 7-footer with a mean streak and 6 hard fouls. A Brad Miller type.