Docstoc...the YouTube for documents.

In their own words...

"Docstoc provides the platform for users and businesses to upload and share their documents with all the world, and serves as a vast repository of documents in variety of categories including legal, business, financial, technology, educational, and creative. All documents on docstoc can be easily searched, previewed and downloaded for free."

I did a quick search

and was  suitably impressed with the results.

Previews of the documents were obtained by clicking the thumbnail image...

Take a closer look yourself at http://www.docstoc.com/.