That's the one downside of this particular PDF viewer - the PDF has to be publicly accessible. The rendering is being done by an undocumented feature of Google Docs. The big plus is that it's not browser-dependent - it even works on smartphones.
I notice that Laza is using it in his skins, as well. It's just so much better than the other options out there. Maybe someday HTML will include a nice, simple <pdf> tag. Showing videos on a web page used to require all manner of external scripts and thrashing about, and
that finally got fixed.
