I took this last night on the approach to La Guardia after a trip to DC. The stewardess only asked me to turn the phone off after I'd finished taking pictures. It's okay if you plunge everyone to death by avionics failure if you're in first class.
I don't really buy into the mindset that iPods and other non-broadcasting electronics are capable of electromagnetic leaping ninja kicks. The whole idea of turning off anything electronic during takeoff and landing is overkill. There has to be a good debunk of this somewhere online.