While Maya imports .obj files, that's not it's primary format. Maya uses mostly Maya Binary files (.mb) and Maya ASCII files (.ma). They also seem to be version specific, like most .max files... (IE: Maya 4.0 file won't work with Maya 3.0, and sometimes, vice version, but not often...)
Here is a link to the Maya Dev tools section at
Highend3D.com. They have a ton of info there.
Here's a direct link to the Maya 4.5 Dev Kit.
If you can figure out a way to import LW Metanurbs as Maya Nurbs, you will be a
GOD to a LOT of people!
Oh, if you have Windows 2000, or XP, it'll work. They're on the NT platform, remember?
And feel free to use me as your guiniue pig if you need to.