I did some changes and pushed them to the Panucci repo. You can grab them by pulling from git://repo.or.cz/panucci.git. You might need to add some tweaks for the Desktop version, I wasn't able to test it, although I've made sure that it's easy to support the Desktop version as well.

I've also changed the ordering of the app menu a bit (to be more in sync with the ordering in gPodder) and moved playlist-specific items to the playlist window's app menu. Also (as I needed that for testing) I've fixed the path-specific code to make Panucci runnable from a Git checkout without the need to install it. Simply git clone the repository and start with "bin/panucci".

The current labels of the actions are a bit short and not very clear. Suggestions:

Scrolling labels -> Scroll long text in main window
Lock progress bar -> (invert meaning in the code) -> Seek by touching the progress bar
Dual Action Button -> Secondary button actions (long press)

I'm not sure what "Stay at End" and "Seek back" means, but I'm sure you'll figure out a good description/label for those, too.