Hi Charles, there's also a "Set Path" option in Extrude that you can use to generate an initial surface with a particular control point count - the surface made with that option will have the same control point structure as the extrusion profile in one direction and the path's control points in the other direction.

See here for an example:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1313.2

In the future I do want to make the "Add pt" command be able to add points to surfaces as well but right now it that one only works on curves.

- Michael