There is an NPR renderer called Jot which has an exporter for Blender, Max, and Lightwave, but not Maya.
David Bourguignon, who is involved with the Jot project, thinks that someone who is familiar enough with MEL scripting should be able to write an exporter for Maya using the exporter for Lightwave as a guide.
Are there any MEL scripting gurus out there that can write such a thing?
Here’s the thread in the General Maya section:
And here’s a 64MB AVI showing Jot in action: