Oren Eini presents several architectural concepts – divide and conquer, background evaluation, one way messaging, the single responsibility principle - helpful to build highly scalable systems.
Amanda Laucher and Josh Graham present some of the most important elements of the .NET ecosystem: F#, M, Boo, NUnit, RhinoMocks, Moq, NHibernate, Castle, Windsor, NVelocity, Guerilla WCF, Azure, MEF.
Cliff Click discusses how to optimize generated bytecode for running on the JVM. Click analyzes and reports on several JVM languages and shows several places where they could increase performance.
Nat Pryce and Steve Freeman talk about TDD using Mock Objects. Mock Objects improves the software design and makes the code more easier to maintain and adapt to changing requirements.