More at OECD Work on Digital Content

... a comprehensive analysis on digital broadband content, focusing on growth and value creation, drivers and barriers to growth, and changing market structures and emerging issues with development of new delivery platforms.

The Working Party on the Information Economy (WPIE) is undertaking stocktaking studies of sectors where digital content is transforming value chains and business models. Initial sectors studied are: scientific publishing, music, online computer and video games and mobile content services. The studies are designed to further identify analytical, policy and measurement issues, and prepare the ground for more in-depth analysis of horizontal issues and challenges to broadband content development and applications.

You may be interested in the bibliography, which includes, among much else:

Stardom, Peer-to-peer and the Socially Optimal Distribution of Music

Navigating through this space, you'll find Microsoft's lessons learned in the first year of XBox Live, where Michel Cassius says that social networking is the key to taking online gaming to the mass market.