Amen. I added that link to the intro to my forums - and in red lettering in my site rules that ppl are supposed to agree to when they register, not to register more than once. But of course, that doesn't always work... :/
BUT - FWIW - there is a link to "Have you forgotten your login information?" on the login page... but I can see how that'd be a good addition to the Registration page as well, just in case...