Hi,
I'm a programmer involved in a group of people that wants to write a FPS (more info at http://www.code43.net/?page_id=9), and during my "engine selecting and reviewing" duty I've recently came across your fantastic piece of software.
I'm amazed by the readability of your source, I can tell by reading it that your approach is very KISS-oriented, for this (and many other) reason I'm very inclined to present Maratis as our chosen engine!
Playing with the behavior class I was wondering:
Can I present a list of values for a MVariable of a MBehavior in the editor like the "shape" list under the Physics properties?
I have other questions but I don't want to engage you in a interrogation 
Sorry if I wasn't clear, feel free to ask me for further explanations.
Many Thanks