Seam integration is my next task. It turned out to be a little harder than I first thought, but I'm going to meet with some of the Seam team here at JBoss World and find the best way to attack the problem.
Hopefully, you'll see some more progress in the next two or three weeks. I'll announce it on this forum as soon as I've got something for folks to try out.
There's some early progress that you might want to take a look at. If you build from SVN and use the org.jboss.jsfunit.seam.SeamClient instead of JSFClientSession, you will see conversation scope support.
SeamClient extends JSFClientSession, so you use it in the same way. You will see some long stack traces in your log that come from conversation tear down, but your tests will still work. Also, I might be changing the name of SeamClient to SeamClientSession.
Any feedback will be most helpful.