Bluent,
it all depends whether you want traffic or rankings.
Today I made a submission to a B2B portal that doesn't allow anchor text or hypertext links. So there's absolutely no page rank benefit. I just posted my URL as normal text. See:
http://www.travelmole.com/stories/105849.php?news_cat=
However, within 2 minutes of my posting being accepted the article was generating traffic. I had 70+ unique click throughs from people who just lifted my URL off the page. See:
http://travelthinking.blogspot.com
One contact e-mails their details and was a real hot lead from Switzerland. I'm seeing the prospective client in London next week. Never forget you're running a business not a vanity show.