Friendfeed, a service that turns updates to sites such as YouTube, Yelp, Flickr, and Twitter into one single feed, announced that its blog headlines will now feature Disqus' comments from users' friends.

Disqus is an enhanced comment system for blogs, allowing the user to track comments and replies, and categorize them. Every time a user posts a comment, a new thread is started in his own forum, and replies posted in that thread are linked to the original. While it may seem like recursive commenting, the result is a structure supporting more visible comments.

Though it just entered what it calls "Beta 2" this week, Disqus is already in use by more than 4,000 blogs and Web sites. It also supports OpenID through Clickpass.

FriendFeed's integration of Disqus increases the visibility of individual comments even further. Those placed on blogs and news sites are fully catalogued, centrally accessible, and back-trackable.