Hi,

a fellow student of mine once found a tool called garmap. It's open source and allows to extract the vector map data from garmin map CD's, which are available for most regions all over the world. I've attached the complete source code. Since the biggest problem for a real navigation solution on the empeg always was the lack of maps, we could now extract the data from the garmin CD's, store them in our own or an open format, copy them to the empeg and make gpsapp use this data!

EDIT: here is the file. Don't know why the attachment didn't work.

cheers
Thorsten