We're testing out a new comment system for the articles on our homepage. It's an updated version of Disqus, which has the advantage of being real time. Among other changes, comments are now threaded.
We're going to test this out for a few weeks and see how it goes. If it doesn't work out, we'll go back to the old system.
Let us know what you think.
P.S. If you haven't checked it out yet, do take a look at our new Activity Stream feature. It's pretty neat: