I just noticed that BPS has updated the What Are My Schools? tool so that you can search for the 2010-11 school year. I think they usually update it for the Citywide Showcase of Schools, which was a week ago.
This tool gives you a list of schools in the zone for the grade you're interested in (K0, K1, K2). It also tells you which schools are your walk schools (those within 1 mile of your home). You can also determine the schools for which you are eligible for bussing.
My walk zone schools stayed the same. (I thought for a while there was some discussion of tweaking the walk zones a tad. Maybe not. Maybe school choice has just invaded my dreams.)