I didn't find a forum to discuss this issue. I think this could be the suitable one!
I have already heard about the validation features for entity beans by using hibernate annotations.
Wouldn't it be nice to have such features in the common ejb3-spec? From my point of view it's not a feature that's only interesting for JBOSS/Hibernate users!
True, but its late in the ejb3 spec life cycle to be introducing such a feature. We'll look to standardize this in a future effort.