In the new issue of AUGIWorld (The one blessed with David Harrington's face) I have a pretty lame article on making the AutoCAD interface unrecognizable. Why, because I can, and maybe you will learn something you didn't know before. It happens to me most everyday. Check out page 33 and 34.
While you are checking it out, make sure to look at all of the really valid and usable articles as well.