I think more options never hurt.
But you should check this with EJB3 team, on their dev forum perhaps.
btw: how's the book coming along? No MC questions from you. :-)
We have decide to publish the book based on what is in CR1, after we re-verify the contents of the book against that release. Then we will keep our fingers crossed hoping that there are no more configuration surprises (like we got in beta3 and beta4) between now and GA. So it should go to the printer some time in August and hit the shelves around October. It would be nice if GA came out before the book. (hint, hint) We expect to put out an addendum on the book's web site to cover and changes in GA.
Personally, I am glad to get it over with. We actually finished writing the book last year and have been sitting on the text since then. And every beta that came out after that, we scrambled for a month to update things. This now makes the 3rd time we have updated it.
As far as the MC goes, about the only mention is the architecture discussion and some configuration (the hot deployer options, for example), so we do not go in-depth into it. The focus of the book is more on configuration (of the app server and of Java EE apps) than on development.
If you open up a JIRA (project EJBTHREE) and attach the files, I'll look at commiting them into the distribution (a la the JMS Configs).