How Seam has nothing to do with JSF?
Seam was built to empower JSF in the first place.
Joined: Mar 22, 2005
OK, maybe not "nothing", but JSF is just the view layer (or, by now, one of several view layers) for Seam. I guess if there are questions that arise during development with Seam that concern nothing but the view, then the JSF forum would be appropriate. But since everything that touches on other aspects of Seam would be better placed in "Other Application Frameworks", that'd be a good place for *all* Seam questions.
Full stack frameworks are a tough one. At some point the questions can become more about the underlying technologies and less about the overall framework. But I agree with Ulf, Other App Frameworks is a good starting point.