I'm a belgian user who tries to map my hometown Nijlen and surroundings (East of Antwerp).
As I'm traveling a lot through Belgium for work, I'm also mapping some highways.
I'm using an i-Blue 747 as logging device.
Added a Garmin eTrex Vista to the collection. I'm using the OSM Garmin maps on the device. This allows me to verify the situation on the map with the actual situation. Makes finding missing streets very easy. See http://www.osm4you.com/ for the maps.
I'm also experimenting with using a dictaphone while driving my car. This way I can easilly make 'notes'. The panasonic I bought not being compatible with linus is my main problem at the moment.