No Comment, No MT et al.
Comments are the ichor that courses through the blogosphere's veins. A blog with no comments is probably dead, and a blogger that doesn't comment on the blogs of others probably needs to get out more.
But if it's hard enough keeping track of all the interesting things happening so that you can blog about some of them, keeping track of all the comments to your comments has been practically impossible. No longer. As this TechCrunch piece notes , there are now no less than three rival services that will help you track comments. Maybe I ought to try one.