I made the mistake of trying to watch "Dances With Wolves" on a plane headed to L.A. once. Of course, my player ran out of juice right when I got to the good part of the movie. Belkin's TunePower for video-capable iPods should be able to prevent this type of cliffhanger ending.
The TunePower adds up to six extra hours of video playtime to the iPod video on top of the approximately two hours the iPod is natively able to provide. This means the battery pack should be able to provide enough power to last from the time you get to the airport, through the mandatory strip search, and all the way through the end of the flight.
Belkin announced yesterday that the TunePower should be available in late March and will will cost around $79.99. Two sleeves are included for the 30GB and 60GB iPod. A low-power indicator on the battery pack shows when it's necessary to charge the device using the AC adapter included in the kit.