When you write OpenSocial applications for MySpace, you can reach millions of users overnight. Building OpenSocial Apps shows you how, one step at a time. Whether you're building casual widgets or feature-rich, professional applications, this book will teach you everything you need to know. The authors are the leading experts on OpenSocial and MySpace and have personally helped construct the MySpace platform and OpenSocial standards. In this indispensable book, they walk you through the entire process of building apps, from signing up through building complex apps that can scale to thousands of users and interoperate on more than fifty social networks, such as Hi5, Orkut, and LinkedIn. They demonstrate today's best practices for building OpenSocial applications and present dozens of tips for leveraging both MySpace and OpenSocial to their fullest.