A good point about the demo
I think, though, that the point is Oleg doesn't have the time to work on either.
Dolphin, Oleg seemed to state that, since the beta isn't going to be open to the public, then maybe they are already testing it? As far as their internal testing process goes, the impression I have been under is that it kind of negates the need for a BETA as their platform (that is SoW) is continually being changed, developed, bug-tested, cleaned, changed, developed etc