After quickly skimming through the above link, I think this has a lot of potential.

One thing that would be neat is that if you could list out all the ‘segments’ in your podcast, subscribers could use yet to be developed podcatching tools to get just the information they want from a broadcast.

Also a new XMLTV savvy audio players (software & hardware) could allow you to see better meta data about what you are listening to, and let you do more intuitive fast forwards and rewinds.

Something like this would also help podcasters who are trying to piece together content from other podcasters who currently are effectively ‘wasting’ a lot of time doing manual searches.