A mockup for a more user-friendly comment form
Here is an interactive demo of what I think the comment form should look like. (Tested in Firefox and Google Chrome)
Major ideas from this mockup:
Two forms of non-account-based login
Either enter your name and an email or go completely anonymous. There is a clear warning message that shows if people go completely anonymous, letting them know they won't receive a notification of a reply.
Higher priority of a Wordpress-style login (Enter name and email) rather than an account based one
From what I see, people do not want to create an account to post a comment on your website/blog. Even if Commento gained a marketshare the size of Disqus, it is still an extra step that most people don't want to take. Check out Switching Away from Disqus Review – Increased Comments by 304%.