Go get yourself and account at coComment. Not sure how they’re going to make money off this, but track all the comments you leave on different websites all over the blogosphere. You can even have an rss feed and you can get them integrated into your actual blog. The design and implementation of the service looks fantastic. I generally hate to host things off my server, however until now I never had the chance to track my comments. Which is probably why I don’t comment as much on websites as I would like to. Expect to see my ugly mug appear on a few more websites.