I needed a commenting system for my blog. At first I thought about using Disqus. But then I thought, why use something that I don't like at all. And then that idea just came to me. I thought, why not use Twitter as my commenting system. And so I created a little javascript utility called Taco (Tweet A COmment).Taco is a javascript utility, that will let you to use Twitter as your blog commenting system. It's still a very new project and I'm going to improve it a lot over the next days.
You can see an example at ragnis.github.com/Taco/example/