This document provides an overview of intellectual property issues related to Web 2.0. It begins with background on Web 1.0 and an overview of key characteristics of Web 2.0, including its treatment of the web as a computing platform and emphasis on openness and user participation. It discusses who owns data content in Web 2.0 and common licensing approaches. It provides examples of terms from licenses for RSS, Google APIs, and Wikipedia. It concludes with recommendations for commercial use of data content and tips for companies utilizing Web 2.0 technologies.