As many of you know, I have been working on OSGi support in the JBoss Application Server for the past year now. My colleagues at JBoss/Red Hat and I have built an OSGi Framework from the ground up with as focus the best possible integration with the Application Server.
AS7 has been OSGi-enabled since its Alpha1 release and over the past few weeks Beta's have been pushed out on a bi-weekly basis. It's starting to look really good!
Next week at Red Hat Summit/JBoss World in Boston I'll be presenting and demoing the current state of things w.r.t. to Core OSGi, Enterprise OSGi and OSGi/AS integration in AS7. My session is on Friday at 11am: http://www.redhat.com/summit/sessions/jboss.html#38 - hope to see you there!