No, becoming J2EE certified costs alot of money and resources and that would mean that Jboss would cost money. But apparently Sun has recently agreed to do certification testing on certain open source projects at no cost in the future (probably not for at least a year or so). I don't know if they will do it for JBoss. Anyone else heard more about this?

However, Jboss is J2EE compliant and may be the closest standards based J2EE server on the market.