also the other way around... nvidia (mental images) is not making the integraation that easy... but thats an other storry... they are now working together to solve this issue... mr is now a plugin in maya 2013...
Considering Autodesk's own rendering engine is childs play, I don't think it's wise to design a rendering engine around the software instead of designing software around the rendering engine. You put an engine in the car, not the other way around. I'm glad they've both made steps towards this plugin. It sounded like we wouldn't see it until 2014, but this is good news indeed.