Teena, thanks for the additional information. This covers our YC stay next month.
Amy, just wanted to add my two cents. We've stayed at BC many times and the jib slide was down for part of our Feb. 2011 stay. Our boys are currently ages 5, 11 and 12, and our two older boys do love that slide. They've stayed at a number of WDW resorts (see below) and the jib slide is definitely their favorite. But I can also say that they were VERY excited about the ability to stay at BC, use SAB and pool hop to BWI. (I just noticed that you've stayed at BWI in the past, so you're familiar with it already.) And I can also say that during our last BC stay in August 2011, the boys used and loved the jib slide, but spent the majority of their pool time in other parts of SAB.
So I would not give up BC and the rest of SAB, even with slide construction. And while BC is my favorite resort, I love many others. So I'd tell you if I thought a resort switch would be a good fit for you, and I don't! I know that's easier for me to say because we've stayed at BC many times, but I'm confident in my decision to stay at YC/BC next month during the construction. (I say YC/BC because I frequently waiver between sticking with my decision to try YC and returning to my old favorite, BC.) There is so much to BC in addition to the slide, and I hope you decide to stay!