Yes,
1) sure the most important thing is quality and fresh updated content
2) Google PR (now I mean toolbar PR) is not GOD but it can shows how partner site is relevant or not. It's good to check whois of sites with n/a tool bar pagerank for possible google ban.
3) my seo tool only helps you to do this dirty slow work do automaticaly.
...more about seo on seochat.com
