First, I want to say I'm extremely excited about JSF 2.0, and I think it's a major leap forward for the framework.
That being said, there's one thing that's been bugging me for a while: no built-in support for conversation scope. (For those who don't know, "conversation" scope is shorter than a servlet session and longer than a request, and is popular in frameworks like Seam, Spring Web Flow,...
In case you hadn't heard, Apache Shale is moving to the Apache Attic. What is the Apache Attic? It's a new project, started last year. It's where other projects go to die.
According to the Apache Attic site:
It is intended to:
* Be non-impacting to users
* Provide restricted oversight for these codebases
* Provide oversight for active user lists with no Project Management Committee (PMC)