Satellite 6.3 beta?

I can see a Satellite 6.3.0 beta ISO & packages on the downloads page for my account...but I can't see documentation for that version anywhere, so I am loathe actually try using it (even in a test environment - based on previous Satellite 6.x updates, following the old documentation exactly is not likely to work).

Any word on when 6.3 beta will be (more or less) "officially" available for testing?