Thank you for the incredible podcast grabbing script.  I'm using it in conjuction with mythtv, so not having a GUI is perfect, and I get to watch video podcasts on my TV. 
I made a couple modifications for my benefit, which might be useful to others.  I'm most definitely not a programmer, so they might be ugly.  Mostly to allow me to control the number of podcasts downloaded from a new podcast.

I added the following options:

--help    to display options (for when I forget, which I do)

-n     to interactively add a new podcast URL
-u [url...]    to automatically add a new podcast URL as the second argument

I didn't like that it downloaded all podcasts from a feed, so I added a variable (downnum) to tweak how many episodes to download from a new podcast feed.  I also functionalized the body of the script so I could call it twice when new podcasts are added.

I also included another script i'm using as a cron job, which checks the contents of the podcast.log for all downloaded podcasts, then finds and deletes the podcasts it has downloaded which are over a certain age.  It checks the bashpodder.shell script for the datadir.  That script might not work with the default functionality of your script because I'm downloading all the podcasts into one folder, my /myth/video directory rather than organizing them in folders by date.  But it could be fixed by sending the find command into a lower directory (find ./ -name $url -mindepth 1 | xargs rm -f).  Podcasts can be preserved by changing the name in any way, since they will no longer match the originally downloaded name in podcast.log

Thank you again,

SyvanX