A big missing piece of blogging is was how on earth does one keep track of all the URLs of blogs you commented on.

I’ve been using co.mments.com the last month or so and it’s been working great. It makes this task smooth once you add a bookmarket to your browser and subscribe to the feed they give you. This feed displays any posts that have been made since yours.

If you use Feedburner, you can add a “Track co.mments” link to posts both on your site and RSS/Atom feed. Nifty.