Since Network Surface isn't even in SDK I'm not sure what the chances of getting this in as a component. Here's a very sketchy VB that calls Rhino commands to create a network surface. The surface will only work if the original curves can be determined by autosort. The component also works best if the curve list going into the component is not directly modified as Rhino geometry (at subObject level).
As Luis suggested here, you can add MRhinoView.EnableDrawing(False) at the start of the script and MRhinoView.EnableDrawing(True) at the end - this will turn of the viewport update - it can be a little buggy, however, pressing ESC will return true. I couldn't find how to turn the command prompt echo off as this should also speed up the operation.