If you track and comment on a lot of blogs, you know the trouble with blog comments is that it's hard to remember which conversations to keep track of, especially when old posts pass below the fold. co.mments is a cool web service that makes doing so a whole lot easier. The meat of the thing is a bookmarklet that you click on when you're viewing a blog post. The post is added to your co.mments page and from then on you can track its new comments from the co.mments site, or subscribe to an RSS feed for comments on all the posts you're tracking. co.mments is also among a growing number of web services that you can use without registering a user account (a cookie identifies you instead), which makes it easy and to try out without giving up any privacy. If you decide you like it and want to use it from multiple computers, then you can fork over your e-mail address and get an account.