Wanted to drop a quick pointer to Jettro's thoughtful blog post on our humble framework. He really understands what we're trying to do here, and has identified a few issues that will be resolved for RC1.
On the subject of RC1, it's obviously behind schedule. Not for nothing, though; this past weekend saw many developments on the build front which should help get us there. More to come; browse our issue tracker to get a sense for what remains to be done.