If you're interested in VSTa
(it's an historical oddity, and it is no longer developed), I've moved the primary
copies of available text and documentation to a
Gopher server.
You can reach it
here.
If your browser doesn't support Gopher (tisk), you can try
via the WWW-to-Gopher gateway;
the VSTa gopher content would be reached via
here
The source code--including history going back to its
earliest days--is hosted at
Github.
Andy Valencia's (very humble) home page is here.
Expect it to migrate to Gopher at some point.