I added some content related plugins. I got rid of the SI Captcha plugin as it did not seem to be doing anything and I was getting spam anyway. I was getting quite a few hits on the captcha image and I believe that the spammers were running OCR on it.  I replaced it with the Math Comment Spam plugin. I like the idea that only people who can do simple math can make comments on my site. I was thinking about making a Calculus Comment plugin so that only people who can solve calculus problems can make comments. Perhaps a little science quiz comment plugin with questions about evolution?

I added two plugins that send email. This is a might be a little spammy, but I want to try it anyway.

The first is the Subscribe to Comments plugin. This is good in that it allows a commenter to get updates if anyone else makes a comment on  a post and encourages dialog. If you make a comment you can get an email notification when someone replies to your comment.

The other email plugin is the Thank Me Later Plugin. This plugin lets you send a thank you message to anyone who makes a comment. The message is mailed a day or two later so the user who surfs by, leaves a comment and then does not bookmark the site will be thanked with suggestions of interesting things on the site. It is an invite to come back and enjoy the site.

I think the Subscribe to Comments, and Thank Me Later plugins  are very good ideas.