I don't think EJB 3.0 has been on the market for us to realistically expect IBM to have integrated it into their toolset. I'm sure it'll be fully integrated somewhere between the standardization of EJB 4.0 and EJB 5.0.
Seriously, JSR 220 was only standardized on May 11th. It's only like the middle of June. (Don't worry about what year it is)
I know that the WebSphere Application Server 6.1 has a 'feature pack' that allows you to deploy the, just recently released, EJB 3.0 compliant components. But that's a feature pack for the server. I'm not sure what featurepack you need to install on IRAD. The featurepack probably includes various JAR files you can link to from RAD.