Not sure if you guys are aware of this already, but you might want to add Struts 2 to this list as well. Seems they have SWF integrated through a plugin. Check out these for more info:
is it ready to test ?
I try the plugin for struts2+webflow2, but it's not working yet. So I start looking for alternative.
@David - are you still working on this? If not, I suggest we mark it as "won't fix" and concentrate on getting 2.1 out the door rather than adding new functionality that's not in high demand.
This is too old and neglected.