Here is a link to a 14 page Scrum Guide and some case studies (via ScrumAlliance.org) for those interested.
This guide explains how to use Scrum to build products. In doing so, it will describe how the framework and its artifacts, time-boxes, roles and rules work together. Scrum does not include techniques and processes for building products; however, it will point out the efficacy and flaws of these techniques and processes.
Scrum is a framework for developing complex products and systems. It is grounded in empirical process control theory*. Scrum employs an iterative, incremental approach to optimize predictability and control risk. Within each iteration, Scrum employs self-organizing, cross functional Teams to optimize flexibility and productivity.
Have a look at some of the case studies that were presented at the 2009 Scrum Gathering (in Orlando, FL.). It makes for some interesting reading.