I've just been able to get the combination JBoss AS 7.0.2 + Liferay trunk (which will be the 6.1.0 release) + JSF 1.2 + Richfaces 3 + Seam 2.2.2 + Portletbridge 2.1.0 to work. You should be able to get JBoss Portletbridge 2.1.0 to work on your combination, you may need to apply the patch in http://issues.liferay.com/browse/LPS-16991 first.
With that patch on Liferay trunk I was able to deploy the richfaces demo example from portletbridge 2.1.0 dist without any other modifications than building it with the liferay profile (mvn -P liferay), try that and then use it as base. It shouldn't be a difference to get it to work on Liferay 6.0.x
Hi Sverker Abrahamsson,
Do you mind to post a sample combination of Liferay + seam + portletbridge?