Since this is only evident in a comment, I'll post a comment under this question. [FAQ] should direct you to the current site's FAQ.
EDIT: Now a feature-request to have
[faq] default to current site's FAQ, and
[meta-faq] always point to the meta FAQ for both the actual site and its meta. I'm not particularly fussed either way but it seems the more logical way for a default "faq" link to work.
EDIT 2: Actually, now that I think about it, it'd be hard to pick a syntax for linking to the normal site FAQ which applies to all sites (e.g you'd have to start using
[sf-faq] or simlar styles). So I'm happy to concede this one. Retagged as discussion.