On PHPEverywhere there's some info about JavaServer Faces. John points to a couple of articles at JavaWorld, A first look at JavaServer Faces, Part 1, "Learn how to implement Web-based user interfaces with JSF", and Part 2, "Explore JavaServer Faces components".
JavaServer Faces (JSF) is an application framework for creating Web-based user interfaces. If you are familiar with Struts (a popular open source JSP-based Web application framework) and Swing (the standard Java user interface framework for desktop applications), think of JavaServer Faces as a combination of those two frameworks. Like Struts, JSF provides Web application lifecycle management through a controller servlet; and like Swing, JSF provides a rich component model complete with event handling and component rendering.
Which if you've been paying attention you know this perks my ears right up, since I've been learning a lot about how Struts does things to help me in the development of my CMS slash web application framework.
John also helpfully links to a discussion with the creators of JavaServer Faces.
Here's Sun's homepage for JavaServer Faces, the JavaServer Faces FAQ, an explanation of how JavaServer Faces may affect Struts, and for completeness, here's the article on JavaServer Faces I linked to before.
Hmmm... now I could print all this stuff out and read it, or I can watch The Terminator. (Weighs hands...) Terminator wins! Later: Ok, I compromised... I printed everything, and now I'm going to watch The Terminator. I'll read everything later 
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