AOL today announced that they will offer podcast search in the fall with a company called TVEyes. Essentially, you'll be able to do key word searches within podcasts, part of AOL's push to be a bigger resource for podcasting.
This is a good step forward for podcasting generally, but somehow there has to be a way for each podcast to have a table of contents, I think. Maybe it's just me, but I still want to know what I am getting into with a podcast and be able to jump around if I want. Correct me if I am wrong, but right now it looks like its all manual.