According to a comment in HighRankings forum, relevancy is one of the biggest myths in SEO. So is the idea that links from PR0 pages are not worth much. If that PR0 page is within a recognized authority site, you’re a fool not to get that backlink if you can. The notion of “natural” links is way overblown.
http://www.highrankings.com/forum/index.php?showtopic=41993