When will the source become available?
Sometime during the late beta stages or during the official engine launch.
How long until beta and/or the official release?
I've been saying 2 months or so for the past year. I think that's still a fair time frame to shoot for.
Why are there so few questions?
We are in the early testing stages of this engine. Not a whole not of questions have been asked yet to make a list of the most frequented.