[z3t4]

  <form action="mailto:[e-mail]">
    <input type="hidden" name="subject" value="A new comment on the thingy" />
    <textarea name="body" rows="10" cols="41"></textarea><br>
    <button type="submit">Submit comment</button>
  </form>

When the form is submitted the default mail program will be started, subject will be the subject and body will be the body. Now assuming the user does have a e-mail client, all he/she has to do is to click send.

You can then read, delete, and reply to comments, and even send private replies, all via your e-mail client. Then you add the comments to your web-site either manually, or have a script do it automatically.

[kindfellow92]

Startup idea: application that automatically syndicates comment threads in your email inbox back to your website.