I'm especially excited about the latter; up until now, replying to a comment relied on the original commenter to check back on this page. Now, folks interested in having a real conversation can set up Disqus to email them if someone else replies to their comment, even if they don't have a Disqus account.
I'm sure most of you are familiar with Disqus in one way or another, but just in case, I'm going to deliver a little crash-course now.
So yeah, now I have a better way of responding to you guys (especially if you don't have an email-connected Blogger account). And the old comments are importing right now as well, so you may start seeing replies to stuff you already posted. Let the conversation begin! :)