We try to stay away from specific technologies, but many of our examples are based on java code since that is what we are most familiar with. Automation examples are from Fit, Fitness, Ruby and Watir, and others.
Lisa and I have different experiences and been on different projects. We have tried to use examples from all experiences. Small projects with one or two testers, to larger products with several project teams with up to 45 testers. There are also examples from many other practioners. Those examples are what we think make the book really special.
Co-author, with Lisa Crispin: Agile Testing: A Practical Guide for Testers and Agile Teams (Addison-Wesley, 2009) www.janetgregory.ca