I have installed the Disqus comments system on the blog, so you should now be able to comment on each other’s posts, by clicking on the ‘comments’ text in the grey bar at the bottom of each post.
I say '`should’ because I’ve had mixed experiences with Disqus before, on sites I’ve installed it on. Sometimes it works fine. Sometimes it makes me want to throw the computer through the f**king window.
In other words, your mileage [as ever] may vary.