There is a proposal for a Worldbuilding Q&A site over at Stack Exchange. It is currently in a preliminary phase where it is decided if this should be implemented or not.
I guess it could be of interest to at least some of you.

To be accepted it needs 47 more followers and 40 more example questions, each with a score of 10 or more (as of this moment). I'm sure they'll be glad for any and all example questions and votes they can get.
The proposal is open a year, to january, I guess. I think it can be a nice supplement to the world building communities, and the cartographer communities.

Worldbuilding - Area 51 - Stack Exchange