At the last annual meeting (12/02), the BW General Manager said that the BWV rehab project was scheduled to complete in September, 2003. He also said that they were hoping to get it expedited a little and completed in August.
I expect that they will be working on the standard view rooms this summer. Everything else is finished or nearly finished. Maybe someone who has just returned will tell us where the scaffolding is right now.
I doubt any of the work will impair your visit. It certainly didn't hurt ours. Enjoy!