O'Reilly EJB 3.0 Book Question

[Garth Keesler]

I use the O'Reilly EJB 3.0 book extensively. It is really in two parts: 
the EJB half and the JBoss half. Should I be able to follow the EJB half 
pretty closely with GMO or are there differences that will make that not 
very useful?

Thx,
Garth