Power is obviously going to be an issue. With cutom batteries as Nokia has (i.e. not AAs) I can't just go into some tiny little store and buy a new one. Since I'll be writing into it every night, and turning the WiFi on when I reach civilisation I doubt one full charge would get me from town to town. I used a Solio charger for my iPod this year and there is a cable to charge Nokia phones so I should be able to use that to keep the N810 going for longer. My trail name on the PCT was "SunWalker" because of the solar panels on top of my pack.