Hubs have played an important part of many search algorithms. If you want to know what is meant by a hub, I have an ok explanation from February 2004. A thread at Cre8asite Forums named asks the question Nofollow in forum links putting hub status in jeopardy?
A valid and important question to ask. If places like the Wikipedia Adds NoFollow Tags and others use the nofollow tag for all links, then the hub is in jeopardy. I know that the search engines say the nofollow should be used for links that can not be validated or verified (i.e. most blog comments, guest books, forum driven links and so on). But to deploy them site wide for authority sites, then where does the hub go?
Forum discussion at Cre8asite Forums.