Good learning resources for JNDI implementation (JBoss 5)

I have been working with JavaEE / EJB3 web applications for about half a year now. Until recently, I didn't have to touch a lot of behind-the-scenes stuff, just the meat of the code. I've been struggling with JNDI issues, and while I've solved a couple of them, I'm pretty much just doing the whole culinary copy routine. It would really help me understand JNDI better; my understanding of this right now can be summarized as "this is what these classes sometimes do to find other classes."

My question is, has anyone had time to look into JNDI / EJB3 / related topics from the book or online content? I have searched for it, but the material that appears is old or specific to a certain structure that I am not using. I'm looking for something that's either JBoss-specific or generic to be useful anyway.