Another item of interest regarding PDFs (copied from the page):

"DocMorph's Reading Room also now provides an important service that allows
you to submit either scanned images of printed material or text files.
DocMorph will return a web page that uses synthesized voice to read the
material out loud.  It is expected that this new feature will bring not only
biomedical literature, but many kinds of printed and electronic information
to people who would otherwise not have access to it."

<A HREF="http://docmorph.nlm.nih.gov/docmorph/">
http://docmorph.nlm.nih.gov/docmorph/</A>

Marlys