When I worked on the jPodder project, we used the Podcast directory as a main source for finding/discovering podcasts. The decentralized model and community aspects of it were great.
I stopped working on jPodder when iTunes came out with podcast support and haven't looked at the podcast directory much since then. I was surprised/dismayed to discover that the directory has fallen into disarray.
This is a big win for the podcasting community. Let's learn from this and not let it happen again.
Update Dave Winer pointed me to the podcast-directory mailing list. Join and contribute!