So I finally got round to building a package for the Maemo (bora) build of Hercules, and setting up a Debian repository for it and future builds of other stuff for Maemo. You can add the repository by clicking here, and then find Hercules under user/Emulators in Application manager. Or if you prefer you can just download the package here. Since this is my first attempt at building a Debian package any feedback would be much appreciated.
Disclaimer: This is provided as-is, without any warranty of any kind, and don’t blame me if this bricks your device or you find yourself addicted to vintage IBM mainframe operating systems.