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I am on the main jMonkey team, although not as a programmer.
For starters, if you are considering JOGL, I hope you look at JOGL2 on JogAmp , and not at the old junk on Java.net. In terms of using JOGL and jME are two different things. JOGL, such as the LWJGL on which jME is based (and Minecraft to name it), only makes you mostly basically OpenGL easier. It means even more freedom, but you will spend a lot of time creating the bare bones of your game before than you can use it in real games.
jMonkeyEngine, the latest jME3, is especially designed with intermediate developers in mind, not with limitations, but with a gradual learning curve and many built-in game features.
/ takes off the seller's hat
Our wiki is located at jmonkeyengine.org/wiki/doku.php . Even if you are more used to Eclipse, I highly recommend using the jMonkeyPlatform (jME3 SDK) for all your jMonkey developments, as it comes with many tools that we simply could not put in the kernel kernel.
As for books, I do not believe that there is one. Our lead author is working on a contract with Packt . The final book, "jMonkeyEngine 3 Beginner Guide," is expected in late 2011 or early 2012.
I can not speak for JOGL (although I think they would say the same thing), but if you have any other questions regarding jMonkeyEngine, I suggest you visit our forum.
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