There are 2 sites in the SE network that have the faq moderator tag and the faq-proposed tag (Meta Stack Overflow and Meta Stack Exchange). Area 51 does have a small faq, but it's really just the tour page, and doesn't have nearly as much information as other site faqs, which have 32 (MSO) and 152 (MSE) questions. Area 51 is really different from other sites. It seems worthy of it's own faq, and there are already lots of questions that would work well if they were "faqified". So, my proposal is to add a moderator-only faq tag for questions that are commonly asked and can help users learn more about the site, and faq-proposed for proposed faq questions.
I thought this was a good idea, and just to get the ball rolling I made a tag
Not really sure it needs to be Moderator only. There is not that much activity and so it can easily be cleaned up in the case of misuse.