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.