I'm a big fan of BashPodder. What I like about it is that it works
great, and can be ran on mostly any Unix like platform with little
tinkering and no compiling.

However, I'd like to address one issue: the GUI. Most new Linux users
may get a little intimidated if they have to launch everything from
the console and be clueless as to the status.

No offense, but the GUI needs some serious work. I have recently
started an open source project for an extreme modification of
BashPodder for an iPod (check it out at http://bp4ip.sf.net). I'm
almost finished with a GUI for that, and after some testing comparing
it with your existing BP GUI, I have found that it works better, but
what I really like about it is that the GUI is the script (as in:
there isn't a separate script for BashPodder and the GUI). Another
thing that I really like about it is that it graphically shows the
download progress using the --gauge feature of Xdialog (and it wasn't
easy figuring out how to do that). It is currently intended for use
with an iPod, but I'd be more than willing to do a bit more tweaking
to be used as a GUI for regular BashPodder.