CLASSROOMS SANS WALLS? Joel Rose, who led the creation of School of One, left that program last March with the intent of expanding his horizons beyond NYC. Now we hear he's close to unveiling his next project. Our guess: national in scope, nonprofit in nature. And, as Joel is a no-nonsense kind of guy, we're expecting an announcement that comes with all the works: real funders, customers, and an aggressive rollout schedule. Don't disappoint us, Joel!