I have heard that it is great to sign up for high pr forums so that the profile contains a link to your blog.
Ya its true to some extend!!!
Many of these forums links are no-follow links.
You will get full benefits if you start participating often.
High page rank forum profile dofollow links building helps lot to enhance your page rank in search engine result page. It is one kind of profile link building which is very helpful go generate backlinks on our website.