I just found a link to QuotePlay. It's a flash widget for playing mp3 files over the web in a browser. Like, say, for podcasts...
Here's a link to my last podcast, playing in QuotePlay.
It will also let you link to just specific sections of audio (like, for instance, just the section about be babbling about folksonomies) using a built-in audio bookmarking tool. Very cool.
Looks like a pretty major limitation that it has to load the entire file rather than streaming it on demand, but that's a limitation of webservers, not of QuotePlay.