Here's a handy browser tool for those of you who read and comment on multiple blogs. It's called coComment and it tracks all of the comments you make so you can easily return to the conversations later. Wouldn't you appreciate being informed by coComment when someone responds to the posts you've commented on?
You can also share what you've been commenting on with other readers.

The bad news is that it is currently in private beta, which means they won't be accepting new accounts unless they are by invite. The good news is that I foresee this being very popular with bloggers and blog readers in the not-too-distant future. They currently support Firefox, Safari and Internet Explorer. Right now, coComment is compatible with Blogger, MSN Spaces, MySpace, Xanga, Typepad and Wordpress. Maybe they'll support Blogware someday? I'm keeping my fingers crossed.