If we manage it right (and we have so far) bookmarking this:
Will give you the list of meta-questions that are part of the FAQ. As of this moment we have 4 of them, one of which is the canonical-question-question.
The way the system is designed right now, canonical questions should get upvoted to the heavens so they show up at the top of the tag-question lists. Some of them are, some haven't made it yet.
While it would be nice to have a question tagged with the subject and [canonical] for ease of searching...
We really, really don't want guerrilla-tagging of that tag. It would have to be a meta-style red-tag, which is a feature-request that'll have to be built in.