It is slowly shaping up in to something useful...
I did the first "field testing" of the mapviewer's gps option tonite. The link below points to a small video clip, captured with my casio camera. It is a bit shacky, but it is hard to drive and focus the camera at the same time ;-)
[EDIT] Here is another video - in a daylight. http://deniska.dcemu.co.uk/bin/driving_with_PSP2.wmv
I changed the cursor for directional arrow for gps mode... I guess to make it really cool I need to turn the map and not the center arrow ;-)
I still need to patch a number of bugs and build some content before a public release. So please be patient ;-)
PS: PM if you are interested in helping to beta-test the viewer and build content for it (POI, custom maps, tutorials, documentation, etc). I need people who actually built and tested gps link, described in the thread below.