Scrid - A new tool for marketers

I have often seen the logo "Scribd" but never delved deeper into this web 2.0 tool,. What is Scribd?
For start it appears as a tools that major book publishers such as Random House and Simon & Schuster find they can target for marketing their products. click Here. to find out how these publishing giants are leveraging this technology for their gains. Can you think of other uses for Scribd?