Hi Daniel I started to look into this project. Do you have password maker already running on Maemo? Because there are no packed versions available. Sow we would first have to port and pack the CLI version before we can make a GUI Also I would have to know where the config file is stored about which you wrote earlier.
An alternative you could try is KeePassX. The interface is not optimised for the N900 but the password generator function is somewhat usable.