Hi Chris,

re:
> do you think it is possible to extend the ISO curve tool into some kind of ISO grid/network tool?

Is it for modeling purposes or just for display like a type of hatching?

There is a "Multi-iso" plugin script that you can get from Max's file archive page:
http://moi.maxsm.net/media/files/

That may do what you're looking for here.

- Michael