Romain Guy and Chet Haase, who during the past couple of Java One conferences have stunned the development community with just what is possible with Swing and building superb looking desktop applications in Java, have published a new book, Filthy Rich Clients. The book gives walkthroughs and code examples of some of the techniques they have used to build their example demo applications.
You can find online demos of the Aerith application in a few places online, including here, and the source code and additional screenshots are here.