We also need to keep in mind what services rank the highest (Email, Search and getting Health information online), as well as the fastest growing (Using social networks, and listening to music online) in our design of future business service offerings.

FORBES: The Pew Generations 2010 Study Shows A Shift In Our Online Activities

This feature recommended tracks similar to the one a user was listening to, even if that track had not been bought via Apple's online music store.

BBC: NEWS | Technology | Apple addresses iTunes concerns