You may have heard of StackOverflow? It's a very popular question and answer website for computer programming topics. The makers of StackOverflow now permit the same software to be used for question-answer sites on other topics. But which topics get a site? At Area51.StackExhchange.com discussions are held to determine whether a topic warrants a Q/A site in the StackExchange network.
Guess what? There's now a discussion underway to initiate a 3D printing StackExchange site. Check out the link below and you'll see sample questions and other material that may eventually lead to a new QA site for 3D printing.