I was listening to the G'Day World podcast with Ewan Spence today on my way home today and it got me thinking. The show was OK, but I wasn't really into the content of it. Ewan runs a site all about Symbian, an operating system for phones and mobile devices.

Now, I listened to it because I like the G'Day World guys, and I think they have some great interviews, even if they're with someone I've never heard of or in an area I'm not particularly interested in. For example, I've never used mind mapping software, but the interview with Hobart Swan was very good. 

But then I got to thinking about how you would search for particular podcast episodes that I'm interested in, and then be able to subscribe to the search feed, a lot like a Technorati search feed. That way, I can create a feed that sends me podcasts about asp.net, or the ncaa tournament. Or combine them! 

What would it take to get it done? Podcasters would need to include more meta data than they have now. Show notes are nice, but are they enough? Search engines need to know the difference between a podcast, a blog, and a webpage. And of course, search feeds need to include the enclosures.

Jeff Sandquist is looking for something similar, but different. He wants a way to say that he likes a particular podcast episode. I want want a way to find a particular podcast episode.