did you install the ejb3 configuration of jboss ?
all does not include ejb3...yes, its a trick question ;)
I downloaded the jboss installer after learning about it in the user guide. I reinstalled with the ejb3 option enabled. Now I can create my project in the IDE. Joy ensued. Problem solved.
I had originally downloaded & installed the package closest to what I saw on that page. It presumably corresponds to the 'default'.
Thanks for replying!