Kohsuke Kawaguchi discusses the future of Continuous Integration and Jenkins as they will be influenced by virtualization, cloud computing, DVCS and analysis software.
Ashish Kumar on how Google keeps the source code of over 2000 projects in a single code trunk containing 100s of M of code lines, with more than 5,000 developers accessing the same repository.
Rolf Russell & Andy Duncan discuss rapid and reliable releases from the build/release/devops perspective, considering relationships, metrics, required skills, and the need to cut waste and bottlenecks
Dan North discusses an example of rearchitecting an application without rewriting it from scratch, and explains general strategies for a holistic rearchitecture.
Charles Nutter discusses JRuby features, the JRuby compiler, calling between Java and JRuby, Swing and JRuby, JRuby web applications, JRuby on Rails, persistence, build automation, TDD and BDD.
Juergen Hoeller shares guidelines for managing large codebases such as packaging and package interdependencies, layering and module decomposition, and evolving a large code base.