With the new publishing platform, it's easier to comment using any of your credentials: Wi-Fi Networking News is now using the Movable Type 4 platform, the only point of which might be interesting is that you can sign in to leave comments using existing accounts at other services beyond TypePad (formerly TypeKey). I've enabled commenting via Open ID, a cross-system standard, as well as LiveJournal and Vox (services owned by Movable Type and TypePad's parent firm, Six Apart). You can also comment anonymously using an email-confirmation step.
Movable Type 4 also supports comment threading, where you can click a Reply button to respond to someone's comment.
Feel free to try this out on this post.