Interesting. Wouldn't most user's have a portable music player? If so, why would users go to the site to listen to their uploaded music? From a listener standpoint, the fun is in exploring other people's music.

There really are two user roles at Anywhere.fm, the "inner DJ" and the "music consumer". The 1.4 million songs shows that they've been successful at making the "share your music" process easy. The more important statistic is how many people actually listen to any of the stations.