First of all, the FAQ will never cover everything—it will cover the Frequently Asked Questions. Secondly, the FAQ is under construction, so at the current time we know it doesn’t cover everything. Thirdly, we may have overlooked some things, and if you think that is the case you might consider reading on to find out how to contribute to the FAQ.
For the time being, we have decided against accepting contribution to the FAQ as it has proven much too difficult to do as a communal project. However, that may change again in the future, once we have a good foundation laid to work from. Then it might be easier to tackle the big topics for which several alternative theories exist.
If you want to link to the FAQ, you can link either straight to its index page, http://www.westeros.org/Citadel/FAQ/, or to the index of the Citadel, http://www.westeros.org/Citadel/.
We do not, however, give permission for people to put up mirrors of the FAQ.