You're looking for a list of DoFollow forums...? http://forums.digitalpoint.com/showthread.php?t=1566265 No need to thank me
Here are a some lists of dofollow forums http://www.webmaster-elements.com/dofollow-lists/dofollow-forums.htm
i would pick just a handful of those forums and become a regular poster, build a reputation as a good member and not as a spammer