Here are some pretty neat downloads you might enjoy.

Marketing

The Cluetrain Manifesto - "Networked markets are beginning to self-organize faster than the companies that have traditionally served them. Thanks to the web, markets are becoming better informed, smarter, and more demanding of qualities missing from most business organizations."

Everyone's an Expert (about something) -  "THIS BOOK is for anyone who wants more online traffic, more revenue, more followers, more attention, more interest, more donations or more influence. The paradox, of course, is that the best way to get all these things is by delivering less. This is a book about focus and meaning. Feel free to share it."

Money for Nothing (and your clicks for free) - "It’s not that difficult, but it takes some strategy to build web pages that attract traffic... not just today, but for a long time after they’re built."