Hi, Your site looks good. But you need to change the header part, b'coz it will not proper supportive for your site.
You need a better template and not some pre-made one. You site doesn't look very unique; not to mention you should probably create better content. It looks completely dated to me. 3/10.
You should definitely add a FAQ page that explains the concept of when someone writes a post saying something like the current one about the Obama Health Plan. The post says the poster is against, and although fairly obvious, can be confusing to some whether "Pro" means "pro the plan" or "pro the against the plan" and the same for against. It seems like a good script therein, decent SEO. I would add an option on the "reply" part for guests, something like "Just add a password and you can sign up at the same time" field to increase registration. Then once they're in membership, if your script has this, make them have to confirm email from there. Good luck!