http://www.chadvernon.com/blog/downloads/cvxporter/i found this just now, haven't tested with blitz yet but looks promising.
Thanks for the link, the Python code will be very helpful to me if/when I write a .b3d exporter for Maya.
In fact, mashing up this code and the b3d exporter for Blender, plus a liberal sprinkling of luck, I might even be able to write a b3d exporter for Maya tomorrow...
ohhh please do, i would be so greatfull