Im in Oz at the moment and just about any sub $100 car nav has au and nz street level mapping included. Tevion and Binatone (prob lots others) have active hacking groups (try gpsaustralia.net) - windows CE or WM OS. You can put GaminXT over that and then DL .img (garmin format) street maps, bike tracks, contours. Spending a bit more - Garmin Nuvi (with street maps) ?$120 or for a lot more - a handheld. I think only Oregon T has preloaded maps (for US). Ive cycled a bit in W au (Munda Biddy track) and in S Island nz on tar seal - done a fair bit of multi day walking there too. Tracks, shelters you can DL for garmin only