I don't usually like to hike with headphones, but this would be a terrific companion to a hike. I would definitely pay a small amount for ipod tracks if they were done well, interesting and informative and whatnot. Between geology, natural history, flora and fauna, bird calls, etc., there's no end to what could be included. Throw on a few photos for the video ipods that identify flowers, birds, trees, and so on...seems like a huge winner.