Unfortunately the answer is not that simple, in spite of the fact that the error indicates 'no file there.' I ASSURE you, the file is there and several other places in the site at different paths i have trid (ie.
www root, wwwroot/images, etc) - i confirmed this using my ftp client and even tried widening permissions.
For some reason, Google Docs viewer will not see it, but your documentation says nothing about required permissions. Can you please look again?
Thanks!
Mark
PS - In the meantime, another post said "save the desired PDF up to your Google Docs folder, copy the sharing link and post that on your site in an iFrame, which works with the same exact PDF. But, it also necessitates keeping my files elsewhere off my webserver, and it renders other links that can bounce the user out of my site and back to Google docs.