well, GPSdrive is nice, but
1) you need to first download all the bitmaps for the areas you are planning to visit from mapblast and such
2) being a bitmap-based system, it will not allow route calculations and re-routing when roads are busy and stuff
I don't need no stinkin' startup-shutdown controller... That's what journalized filesystems are for...
NavSys, the ultimate navigation app http://www.navsys.org/