I can easily imagine myself listening to music/podcasts/audio books and whatnot on a long plane ride for that long. In fact, I plan on taking my n800 on the plane ride to Puerto Vallarta from Seattle this Monday. A 3x diminution in battery life compared to a previous model is a big deal. A lot of people have discussed how with up to 8 GB of storage (and more on the way with presumed SDHC support) and the side mounted stereo out plug, the n800 has excellent possibilities to replace your DAP/iPod entirely in your gadget bag. Now with these revelations about battery life, the future of the n800 as a multimedia device isn't looking quite as bright...