Neal Ford talks about Mingle, Thoughtworks Studios' project management software. Besides Mingle's features, Neal also talks about the experience of building Mingle on JRuby.
Dragos Manolescu shares insights from evaluating several architectures for Global 1000 companies, helpful for others about to embark on an architecture evaluation.
Ian Cartwright presents some of his work (developed with Martin Fowler) on event patterns: Event Sourcing, Event Collaboration, Parallel Model, and Retroactive Event.
Martin Fowler introduces a simple example of DSL, bringing out the difference between external and internal DSLs, and talking through the trade-offs in using both forms.