This book shows you how to build the user experience by adding real-time chat, streaming content, and including more features to your site one piece at a time, without making major changes to existing infrastructure. You will also learn how to serve content outside the browser realtime. Use the latest syndicated realtime technology, including PubSubHubbub Build dynamic widgets on your site to display real-time updates from various sources Learn how to use the old poll to "push" content from your server to browser Create applications that use Web servers that make sense Tornado large amount of streaming content Understanding the unique requirements to create a basic service chat Use IM and SMS to allow users to interact with your site outside the browser Implement custom web analytics to measure engagement in realtime