We are currently working in a project using JBoss Seam extensively. The interesting and key feature of JBoss Seam is conversations. Conversation combined with bi-jection feature of Seam, just makes state management in web applications slicker and clean.
On the first look you may think that seam just provides one more scope (like REQUEST, SESSION, etc) for state management. But it provides a lot more. If you really want to see how conversations can fix some common issues with web applications (like. back buttoning) I would highly recommend this blog of Jacob Orshalick.
Jacob is also co-authoring the second edition of JBoss Seam: Simplicity and Power Beyond JavaEE with Michael Yuan. The second edition of their book will be released out this year.
Recently preview of some of the chapters of this upcoming book is released. Even if you are already using Seam in your projects, definitely you will find this book more insightful.
So better understand your conversations, before you are timed-out!
