Well, I've made some headway learning Java and porting my game engine to it.  Currently, I'm refraining from using JOGL, a sort of OpenGL implementation.  I do plan on adding that eventually.  I certainly plan on using JOAL (OpenAL) as well, as Java's sound API is VERY lackluster.  I'm sure it's good for a lot of things; just not what I want it to do... well.  JInput will also be used for joystick support and I suppose it may be able to perform the mouse cursor locking feature that is used in many games (first-person shooters).

Anyhow, you can check out my progress here:

http://www.siue.edu/~adieffe/projects/TestGame/TestGame.html

Java puzMule, here we come!