Hi, I found that Disqus is very interesting and that's was a great idea to implement it to Zen Cart.

I did some research couple days ago and finally i can make this work, i am uploading it to zen cart contribution, but i guess this will take sometime to be approved and this is my first time to upload the contribution.
By the way, you still can try the demo or download my module in

http://www.samuelsena.com

Don't forget to do a backup before do anything with my module.