Vista Drivers for the Toshiba M200
Toshiba sites in Europe have drivers for Vista. These appear to have gone up around March 20, 2007.
Toshiba Vista Drivers - Toshiba Europe
(If you get an error page - big red letters - refresh the page and it might come up).
The sites are not displaying well for me, but I was able to get the links from the pages and I have posted those and some comments about using them in
Toshiba M200 Vista Installation Notes - MobilePCWiki