Useful seo services to increase the capacity of yours website. seo tweaks.

http://mysiteevaluate.com/backlinks-blog/
http://www.freesitescripts.com/
http://socialmarker.com/
http://socialposter.com/
http://www.megafoo.com/free-links/
http://www.tcnmart.com/List-of-Directories.html - List of Directory
http://freedirectoriesseo.blogspot.com/ - Here's another good list of directories, sorted by PR.
http://www.webmaster-toolkit.com/link-extractor.shtml
http://www.webmoneywhiz.com/?p=8 - 206 PR4 Dofollow Autoapprove Comment List
http://www.webmasterdeck.com/tools/wsbacklinker/ - Web Stats Backlinker

Seo Forums

http://www.blackhatninjas.com/index.php
http://www.blackhatmoneymaker.com/forum/
http://forums.digitalpoint.com/
http://blackhatpwnage.com/
http://www.moneymakerdiscussion.com/forum/index.php
http://www.searchengineforums.com/
http://www.seoblackhat.com/forum/
http://www.uniquewarez.com/
http://www.warriorforum.com/