[jboss-as7-dev] What is AS 7 kernel ?

Dear JBoss developers, I'm interested to learn more about the release 7 of the application server. The most basic question is: does JBoss 7 has a completely new kernel architecture ? I cannot see traces of Microcontainer in logs, rather : 14:59:45,906 INFO [org.jboss.modules] JBoss Modules version 1.0.0.Beta16 14:59:47,375 INFO [org.jboss.msc] JBoss MSC version 1.0.0.Beta7 Is there any thread/link which discusses a bit about this ? thanks a lot Paul