for gpsdrive. It's been mentioned several times. Its maps are all raster-based, not vector-based, so they're just images instead of actual road position data. Also, since they're just images, it can't do any kind of routing. You also need an active internet connection for it to work, as it just grabs map images off of Mapquest, I believe.
external databases (speedcameras etc)
i want it... no resellers in sweden as of yet. But i guess i could purchase it from uk.
just make sure you get the "plus" version since it contains the special touchscreen interface.
for you amerigo's i don't know anything usable... bugger them about usa-maps and the might crumble