I usually just google the title of what I'm looking for and add "pdf" to it. It's never failed me yet. Don't know if that helps but thot I'd throw it out there.
Building on previous post, you can limit your google search to return links to only certain file types, such as pdfs, by using search string in the title bar...the example will return links to pdfs on the bkackberry playbook. Hope that helps.
