You should add to 4: That no coded communications are allowed over Amateur Radio (AR), everything has to be clear text. AX25 would be horrid over HF, there are plenty of modes on HF that go from 30-1200bps, so facebook might take a while...

N810 is perfect for hacking, lots of gps fun to be had. Like getting a gpx file from your favorite geocaching site and track some caches down; maemo mapper using festival tts engine and a reliable data connection (uses google maps); and there's wayfinder for your commertial nav class app. The only reason i use tom tom is that none of these are reliable solutions in rural australia, neither is tom tom, but at least i can correct tom tom errors enroute. Maemo.org - os2008, have a look.