A collection of various presentations in reverse chronological order:
Open Sourcing Your Enterprise @ Open Source Strategy Forum
Qcon Mini-Talk on Hash Spreads and Probe Functions: A Choice of Performance and Consistency
Starts around 8:55 into the video. Slides
Software Engineering: Design & Code Quality @ Univeristy of Pennsylvania
Agile Software Engineering @ University of Pennsylvania
Fine Grained Coordinated Parallelism in a Real World Application