I would like to suggest we could support Jboss Web Framework kit (1.0). WFK contains struts, gwt, spring and richfaces.
I will use Spring as example subset of WFK.
Current situation:
When I want to develop e.g. Spring application in JBT, I have SpringIDE plugins to support my development, that is OK. But when I want to run it, I need to get Spring libs somewhere. So I download WFK and copy required jars into my project's classpath. If I had forgotten some jar, I'll get NoClassDefFound when running and need to find correct jars and add it to classpath too.
New Situation :
I would like to add Spring libs as a runtime or library similarly as seam. Development of WFK-based applications would be much easier and the first steps (creating the project) much faster.

User would define 'WFK runtime" and provide path to WFK home dir. Then he would be able to add WFK libraries to project's build path.