From the "Damn, that's clever!" book, Podcast Ready recently announced a device-side podcatcher. Rather than running a podcatcher on your computer, the Podcast Ready application is designed to be run directly from your MP3 player.
The Podcast Ready site doesn't have a heck of a lot of information on it yet, but it's functional. The MyPodder beta application is designed to be copied into the root of your MP3 player and run from there. Apparently, you can then browse the Podcast Ready directory and download 'casts directly to your player. The website is touting mobility as the biggest advantage of the system, but since you still have to plug your player into an Internet connected computer of some sort, I don't see the mobility aspect.
What I do see the potential here for, though, is an freakin' revolution in podvertising. If this software is resident on your player already, why doesn't it also keep track of whether a podcast file was actually listened to? Hmmm?