Hi, I heard my name :-) I have just finished coding and testing auto start/stop of gpsd on Maemo for Navit. It should be in the Trunk sources in a few days. Also adding debian packaging rules so it is easier for others to contribute enhancements for the N8x0 series. I will do an AutoInstall file next.
The other Maemo specific addition since Alfredi's version is Full Screen, Zoom in and Zoom out buttons work. This was done by 'gnunux' for an older version of Navit.