I thought it might interest people to know that a Worldbuilding Stack Exchange just went into public beta:

http://worldbuilding.stackexchange.com/

A few people from these forums have been active on there and it's already starting to build up a good pool of interesting Questions and Answers. If it succeeds it will be a really valuable resource for the community.

We already have questions about everything from Are Ravens a Realistic way to Send Messages and Shipping Lanes in Space through to Castles designed to defend against dragons and How Multiple Moons would Affect Tides...