The demo of the iTunes implementation of podcasting was pretty sweet. Totally simple to find/subscribe to podcasts from a directory (like the Radio Stations section), and you can subscribe to any feed you want, outside of the directory.
Probably the coolest thing was the support for chapters within the podcasts - both for navigation, and for display of artwork. You can break a podcast into multiple chapters, each with their own image that changes the "cover art" when that part of the podcast is being played. Could make for quite powerful walking tours (*cough*SFMOMA*ahem*) or lecture recordings (slides of PPT/Keynote in sync with audio).
I'm curious what the authoring process is for these chapters. Assuming they're using stock MP3 files, with ID4 tags marking chapters, how is this created?
REALLY looking forward to the new iTunes.