all about podcasting

Podcasting / Audio

Audioblogger
Odeo
A creative way to record and share audio—and it’s free.
You can record & share audio or download it to desktops, iPods, and mp3 players
Podcastingnews
Podcast Mania
Podcasting for Educators
Podcasting Legal Guide
The Creative Commons people put together this useful guide
podOmatic
Free, web-based tools and services that enable anyone to easily find, create, distribute, promote and listen to podcasts and videocasts
Podzinger
Talkr
Talkr provides a service that allows you to listen to your favorite text-only news sources rather than read them. If you can point us to an RSS feed (a machine-readable version of your favorite blog or news source) we will convert that feed from text to speech

(batch) file conversions:

I'd like to put in a good word for http://www.erightsoft.com/SUPER.html, the GUI front for a set of powerful, command-line encoder/decoders.

It is freeware and has a lively user-forum, as well.
Besides being a nice utility for audio recordings and production, it handles video, including streaming multimedia content of all sorts.