I don't seem to be able to find a Seam example that is clustered anywhere.
Can someone please post an ear with <distributable/> in the web.xml, and an @Stateful with @Clustered on it?
Modification of the booking or dvdstore example would be perfect.
I'm not sure if you have seen this one, but it might help:
http://clusterstore.demo.jboss.com/