Well i know i had some trouble to build some links to my forum.So i did some research on where to get some do follow links.Here are some blogs and a search engine that gives only do follow sites.So hope this helps some people out there. http://theyfollow.seomysite.co.uk/ http://www.followlist.com/ http://www.dofollowblogs.com/ So search for things that are relevant to your site and use them to back link to yours.Make sure when you make comments on blogs to make it relevant to what they are posting about.That way the approve your comment.