If you're interested in recording and streaming media using Flash Media Server 3 (FMS3) and Adobe's Real-Time Messaging Protocol, this unique 267-page PDF-only book is the perfect primer. It is not a reference, but a systematic guide to developing FMS3 applications using ActionScript 3.0, with chapters that focus on specific aspects of the server and how they work.
FMS3 is very different from regular web servers. Because its open-socket server technology stays connected until users quit the application, you can stream audio, video, text, and other media in real time. FMS3 is also quite different from previous versions, a fact that web developers familiar with Flash Media Server 2 or Flash Communication Server 1.5 will quickly discover.
Don't worry. With Learning Flash Media Server 3 and a little experience with Flash CS3 and ActionScript 3.0, anyone can get up to speed in no time. You'll learn how to install FMS3, organize your development environment with Apache web server, and use the management console before diving into the whys and hows of: