My iPod Touch, of course: for movies, audiobooks, ebooks, music, games (the flight was 23 hours); it also gave me email, a currency converter, and maps; it held PDF versions of our travel docs-- a fine travel package. A pair of Shure in-ear earbuds helped block out airplane noise during the flights and allowed me to keep the volume down, which conserved battery life, too. Adding the APC Mobile Power Pack to the kit kept me going with battery life to spare.