Why you should use Disqus
I recently implemented a commenting system on my blog, I choose to use Disqus, and I think you should too.
Disqus is a system that can be used to incorporate comments on a website or blog and has become quite popular lately. And thats for a reason.
This simple installation is not the only reason why you should consider using it when you're installing (or building) a commenting system. It does have an additional advantage.
Regular commenting systems often require some kind of authentication. When your visitors originate from search engines. It's not very likely that they have (or are willing, to create) an account. Disqus uses one single login across multiple sites. If a visitor comments once, it's likely they're still logged in for the next website.
Implementing a commenting system isn't just easier using Disqus, it als provides better usability towards your users. Profit!