iTunes will stop updating a podcast if you have not listened to at least one of its episodes in five days. This script will batch-update every podcast subscription so you don't have to manually update each one individually.
I have posted instructions on how to create a launchd agent to run this script automatically and invisibly in the background to ensure that your Podcasts are always updated.
Possible iTunes bug (July 17, 2014): iTunes 11 may still report a particular feed as not updating (with a "!") even though recent episodes have been downloaded via the script; you will have to manually tell iTunes to continue updating the feed by clicking the "!" button.
Create a text file containing an alphabetical list of chosen tag data
Two scripts copy text from the clipboard to current or to selected track's lyrics
Convert selected tracks and export the converted files to a new folder
Play the selected track and stop
App displays files in iTunes Media folder which are not in iTunes library
Add or subtract a user-entered number from each selected track's Plays