If you aren’t a blogger you probably haven’t noticed this company named Disqus unless you really are paying attention when you leave a comment. But head over to Dave Winer’s blog, click on the comments, and if you leave a comment there, like I just did, you aren’t actually leaving it on Dave Winer’s blog. You’re using Disqus’s commenting service. “So what?” you’re probably asking. Well, there’s a few things that Disqus does.