I've been leading the development of Java applications for around 8 years. On that journey, I have used fewer and fewer features of it with each succesive project.
Nowadays, it seems that specs are a kind of summary of what has been learned from the frameworks which were created in the trenches by people that actually needed to deliver.
My latest project, which has been in development for around 1 year, delivers as a plain web application, and uses Hibernate, Google Guice, AspectJ and Echo3.
Sun don't have the capability, and I'm not sure that anyone has, to provide a full and relevant specification that will allow code to be developed that will run on any application server from any vendor.
Instead, choose your implementations and go back to good old OO basics to design interfaces behind which to hide those implementation choices. You don't need Sun to do that for you.