Are there plans to develop something similar to Delta3D's STAGE?
STAGE – A complete visual editor for
- Map editing
Have you looked into MonkeyWorld3D?
Obviously not. 
maybe you could get mojo to explain why he chose that name for this engine. probably because he is one… the "monkey on our back" so to speak
I usually refer to this engine as jME … 'cause when I say JMonkeyEngine … people say J-what!?!
Most of my work now is in the M&S/research world … so, some colleagues just don't take that name too seriously … at least not till they see what it's capable of 
Actually, the other day I ran into a related problem… when I said jME to a guy, he said… Oh! is it for cell phones? (in reference to the JME = Java Micro Edition)… Confusing if you abbreviate it, informal if you don't… XD I am not advocating a name change, I just wanted to share the anecdote.
I'm not suggesting a name change either … by no means.
You should tell the person you were talking to "nooooo… that's j2me" and tsk a lot. 
The name sounds amateurish, because it is. I just stuck the name on it long before it became anything worth using, that name stayed. However, I must say that the positive responses to the name have far outweighed the negative.
i think you just tried to follow the trend, like iME, but went one letter further to not get in trouble 