This script exports banshee podcast information to an OPML file, which can be imported into feed readers, podcatchers, etc. To do so, simply make the script executable, add your name and email address to it (if you want), and run it.
The banshee database is expected to be at ~/.config/banshee-1/banshee.db. If
it isn't, you'll need to modify the script.
The OPML is output to std out, which can be directed to a file.
You will need the SQLite3 and builder gems (gem install sqlite3 builder).
XML building was copied from [ this blog post
It's not exactly complex, but fwiw this script is public domain if you want to build on it.