No, but I know about it. Another website uses it but I never have. Haven't heard too many good things about it.
How does Disqus work? | DISQUS
Do any of you own an account at Disqus.com?
I have a Disqus account I try to stay logged into. Lots of news websites use Disqus for their comments sections.
Yes, I've an account on disqus