Someone told me that do links are not dofollow, I think that's not true, however is there anyone who knows for sure?
Here is a great list of forums that are dofollow just like this one http://www.smartbloggerz.com/2008/08/100-do-follow-forums-to-increase/
If you're using Firefox, you can always use this plugins https://addons.mozilla.org/en-US/firefox/addon/3036 or http://www.quirk.biz/searchstatus/ to make sure the links are dofollow or not. By using this tool, I can confirm that DP signature link is dofollow. - Dynashox -
Right-click the dp page (whatever your browser of choice might be) and choose "view source" / "view page source". Then try to find your signature links (they look like that): <!-- sig --> <div> __________________<br /> <a href="http://www.robreviews.com/health-and-fitness.html" target="_blank"><b><u><font color="RoyalBlue">The Best Way to Possibly Lose Weight</font></u></b></a><br /> <a href="http://www.loseweightsos.blogspot.com/" target="_blank">Lose Weight Now</a> </div> <!-- / sig --> Code (markup): And now, if yoy don't find a rel="nofollow" clause in your <a> tag you can be sure the link is dofollow !