In my informal tests, this PDA lived up to its promised 6-hour battery life. This case can cause the battery to run down inadvertently, by accidentally squeezing the power button on. However, entering a significant amount of text would be quite a chore. File transfers fly over the provided USB connection. Pocket PC for MP3 devotees.
Internet connectivity requires separate modem.
Expensive, but its color screen, MMC storage, and familiar apps help mitigate price.