Comment on Technical Support by Mark.
The comment features in the Stallion theme are gold. I think search engines reward pages with a lot of comments and Stallion has developed the comment feature even more to replicate the benefits of a forum without the pain. I say this from experience as I am learning this lesson myself. That is any site that requires registration turns people off.
Any site where you can leave a comment, gets engagement. Dave please feel free to continue to develop the comment features any way you think would help.