I got hooked onto the Waypath idea once I saw how it worked. The creators had hacked together a plug-in for MT and Radio. I wanted one for WP and B2. So here it is. Look at the hack code and instructions at http://dinki.mine.nu/word/b2-img/waypath.txt
In simple words, this hack implements a pre-determined number of unsolicited trackbacks from the world of blogs on <i>your</i> post topic. Very cool way to surf the blogosphere! Imagine writing about the weaknesses of Microsoft RPC and getting 10 related entries from other blogs on the same topic. Information aggregation that is useful! See how it works at http://dinki.mine.nu/weblog/ Click on a post to get the post and related entries. Very configurable. Uses php XML-RPC.