Maxxx, I don't see Cinema getting snubbed by big CG houses solely on the fact that it doesn't have MR support, because so many of these other renderers are making their way into the industry now, there will be some way to incorporate Cinema into the workflow.  I know some studios doing this right now.  Even if it's just utilizing some feature in Cinema to do something, then going back into another product to continue the workflow, similar to what Blur is doing with 3dsmax and XSI.  However, since the render pipeline is the lifeblood of any major studio, not having at least export options to an Mi scripted scene file is not playing in their favor.  I believe even Poser here has a RIB export option, which makes it possible to integrate it right into your renderman pipeline.  What's more, MentalRay is not usually used for the entire render pipeline in most CG houses anyway.  I can't think of one that only uses MentalRay for everything they do.