Cliff Click explains 0xdata's H20, a clustering and in-memory math and statistics solution (available for Hadoop and standalone), writing H20's memory representation and compression in Java, low latency Java vs GCs, and much more.
Bjarte Bogsnes talks about Beyond Budgeting and the challenges and approaches to implementing it in organizations as well as its history and acceptance in the Agile community.
Gojko Adzic talks about the need to iterate and learn about business value before jumping into solutions. Impact Mapping helps visualize and learn which behavior changes impact business results. Those changes might not even require any kind of software delivery.
Kupe Kupersmith discusses his session on Improv at Agile 2012 and how it can help both teams and individuals communicate better.
Max Sklar talks about machine learning at Foursquare, the use of Bayesian Statistics and other methods to build Foursquare's recommendation system and much more.
Dennis Stevens discusses ways to identify and focus on business value and risk mitigation in Agile projects. As a contributor to the Agile Extension to the BABOK, and in his work on the ICAgile Business Analysis & Value Management area, and how to identify, prioritize and mitigate risk in software development projects.