Well, one person asked for this, anyway. A recent update to Automattic’s quite splendid Jetpack plugin offers a new feature – you can now subscribe for email updates for posts and comments.
If you’d like to get an email every time I post some nonsense, have a look at the box at the bottom of the page (you might need to scroll down a bit). You’ll also find a ticky box or two on individual posts which will let you subscribe for updates on comments.
 Hi AJ