I'm flip-flopping between getting one of the new nanos, mostly for watching videos/TV eps on the train and tube (UK equivalent of the subway!). How does everyone that uses the nano for watching videos find it? Obviously the screen is tiny, but I hear because of the brightness and high DPI count it's decent. I only intend to watch 30min/1hr tv eps on my tube journeys. About 45mins from end to end, perfect time to watch an episode of Heroes or Prison Break etc. Opinions welcome!