The OC4J team just released a preview of their EJB 3.0 supporting server.
I was in charge of getting the main OTN page done for this, and everything was basically ready a couple of days ago.
But we couldn't go public before the official announcment today.
Since I woke up at 5:00am today (damn cats, why do they want to go outside in the rain at these hours I will never know), I decided it was a good time to get the page public on OTN.
So now you have it live here: http://otn.oracle.com/ejb3 - an easy to remember URL. Check it out, lots of samples and technical papers.