you can use our new product JBoss Portlet Container for Portlet 2.0 which is a stripped down portlet container implementing 2.0.

this product will be integrated in JBoss Portal 2.7 targetted for Q3 2008.

the portlet container integration status into 2.7 has reached milestone 1 which is to have the upgraded portlet container fully working in the branch, for that you need to use the SVN branch : http://anonsvn.jboss.org/repos/portal/branches/JBoss_Portal_Branch_2_7/

btw here is the URL for the portlet container http://labs.jboss.com/portletcontainer/. We will likely do a Candidate Release 2 this week with a new event debugger portlet.