vbscript is a subset of the vb programming language. Asp.net uses the vb language. Much better typing, includes a little different, etc. MS has a page on the differences.
You can intermingle asp and asp.net on the same site.
Your biggest hassle will be understanding the difference between the .NET framework and the way asp/iis works.
Where asp has about a half dozen classes - e.g. system., response., request., etc., Asp.net has around 3500.
Any code glitches that shouw up from running asp code, will be readily apparent and easily fixable. Understanding the environment well enough to produce good code as opposed to code that just runs will take longer. But hey, ya gotta start somewhere.
I give asp three more years. Parts of it have already been deprecated. With MS Server 2003, even more is deprecated as iis moves to xml/ado/clss/component based web development. In 2006, MS releases their next browser version. Betcha there's a new iis with it that just kills classic asp off. MS has walked away from languages before.
Edited by dpyers