Nike's special iPhone app is just for runners.

Two Foursquare employees are in a heated fight to reign supreme as "mayor" of a Chipotle restaurant in New York City.

Always a proponent of new technology, Jac Holzman has been at the helm of a great label throughout turbulent times. Holzman told us the music businesses has undergone more fundamental change than any other facet of entertainment over the past hundred years or so. We talked about everything from player pianos to vinyl singles to music blogs to YouTube.