I agree with the opinion, that there were/are some Java based Open Source CMS projects out there (openCMS, Wyona (now Apache), Redhat (former Ars Digita) and others). When talking about PHPNuke and talking about "non-Java-based" projects for JBoss, the guys had have to look on Zope also. There were/are better Open Source CMS projects than PHPNuke.
But isn't there another intention behind this article than just talking how sey Java based applications are? Besides appservers and database servers there is just one application, which is on the brink to a commercial hurdle: CMS! (Onlineshops like Intershop, Broadvision and others are almost out of busines).
IMHO the JBoss group is trying to settle new grounds for their business. Next to the Apache project, the Jboss group is perhaps the only one who is able to push an Open Source project into the community. At the end of the day this "company" is selling services and makes it living out of this services. So from their perspective, why pushing another Open Source project when they can push their own?
"Is it just a new business for the Jboss group?"