No need to be sorry Marc! Every single Podcast that goes out is chock full of metadata, all you have to do is look for it - and get on the cases of the iPodder guys, server vendors and everyone else to start making it more accessible for people like you. No hacks necessary - perhaps some hacking, but its right there for you to take a gander at.
The metadata I'm talking about is enabled by a format called ID3v2 - a description format that's almost as old as MP3 itself. It allows a publisher to describe their audio in a zillion different ways, include transcript, binary objects (like album art) and so on...at some point, I fully expect all the major aggregators and weblogging tools to start reading this stuff and exposing it to the end user.
And almost as if to prove my point - check out the tagline for the ID3v2 website
"ID3v2: The Audience is Informed".