I've posed this question to the JSR-220 EG, but I'll ask here as well, especially considering that at least one member of the EG is on the JBoss team and monitoring these forums:

EJB3 Expert Group:

I work for a smaller company that likes the standards-based approach of using EJB?s, but until reading the EJB3 specification, generally considered the extra development effort hard to justify. With the simplification of EJB in the 3.0 specification, the idea of using EJB?s in our development is very attractive. In its current form, the specification meets almost all of our needs without burdening us with extra (and usually redundant) code.

With that said, we?re considering starting the development of our next big project using the early draft specification of 3.0 w/ JBoss?s preview release of EJB3. The question for the expert group then, is: While I know you cannot generally recommend the use of a draft spec for production use, does the expert group consider this draft specification to be close-enough to the final specification document that you?d consider product development using the EJB3 specification acceptable? In other words, will the final specification differ significantly from the current draft release, or will it be reasonably close to the current draft? Along these same lines, when do you expect the next draft and/or final release of the specification?