When I'm blogwalking i found something good to blog. Especially for comments form. As an example, look at the situslakalaka.blogspot.com. If you like the comment form continue reading this tutorial. For the firts, go to disqus.com and click sign up see the circled picture.

On the firts page register :
# Site URL : Write your blog URL here.
# Site Name : Write your blog title here.
# Site Shortname : Write your nick name here.
# Username : Write your username for log in here.
# Password : Write your password here.
# E-mail Address : Write your e-mail address here.

     If all is completed, click continue and you will be brought to the second page. On this page we must setting the display of comment form.
# Language : Is the language of your blog
# Optional Features : On this setting just arrange your own taste and then click continue.

     On the last page, choose where you will install the comment form. WordPress, Blogger, Tumblr, MovableType, TypePad, Drupal, Joomla, Squarespace, Yola, DokuWiki, Storytlr, Sandvox, or chi.mp. When it's finished click save and finish.