I've added some very simple podcast support to my Real audio downloading script, realToMp3. It just downloads the first mp3 content that it finds in the given podcast feed, which works fine for weekly shows where you also have realToMp3.py running weekly too. I thought it'd be nice to have the same script doing the Real stream and the podcast, where the download type is determined automatically. As always, the script is uncompiled Python, so you can read and modify to suit your needs.
Update 10-Apr-2007: I've added an optional second parameter that lets you specify a filename to save to, which is useful if the stream you are downloading doesn't have a very good title to start with (which is what the script usually uses).