A better trackback
A discussion on Aquarionics nails why TrackBack isn’t quite there yet (emphasis mine):
Plus, to support Trackback, I must put what amounts to part of an RSS feed in each post so that Movable Type’s Bookmarklet thing can magically know what to do. I don’t object to the idea as much as... well, there has to be a better way of doing this.
In the comments attached to the entry Stuart links to his thoughts on a better way of implementing the same functionality, using an XMLRPC server that can be auto-discovered via a <link> element.