Lumenlab is a concept, a commercial site and a community, all build around home theater video. I like it for two reasons. First they are supposed to be good (as in good beer), and second they maintain an FOSS-like community around a paying concept (basically, you buy the guide and get accesss to a forum), which means they make money out of it, and in a cool manner (because of above said: they are good at it). They do have a public forum, closely monitored so that no trade secrets filter out.