When I was writing my dissertation, I found I was most productive in turning out words during cross-country flights.[1] I also spent a great deal of time in a few coffee shops writing as well.
Coffitivity, a new website brings the sound of a coffee shop to anywhere. I doubt anyone will create this type of site that recreates airplane noise though.[2]
I have been using it as background noise in my office. Unscientifically, it sure does beat relative silence.