Ability to add captcha to comment submissions

I just installed this plugin, and I have to say it’s great. The only functionality that I didn’t see, and that would be very useful, is the ability to add this to comments. We have a blog area on our site, and having the ability to add a captcha box to the comment area of these posts would be very helpful. Are you planning on providing the ability to add captcha to posts and possibly forms? thanks

The page I need help with: [log in to see the link]