VRay users can check out the new collection of shaders for Maya, created by Paul Markowski Dreisen and Oilver.  In addition to the shaders, you can download a MEL script that can convert 3dsMax materials into VRay Shaders suitable for Maya.

Check out sample renders of the shaders here.

Check out the MEL script here.

Vray For Maya Shaderlibrary | cgheute.