July 30, 2002
Now that's neat: TrackForward, a plugin to show the posts of the pings you've sent, rather than the pings that you have received from other posts (which is already included in MT).
Confused? Yeah, I'm a little confused myself. But it's reversing an already confusing (for some) concept (it took me 30 minutes to explain it to a person I met at a blog meetup, and I ended up confusing myself).