Here is the video of the app dev throwdown session. Very impressive solutions built using the IBM Social Business Toolkit. A must see for developers.
There are also several other videos of keynote sessions on Livestream.
Abstract:
On Day 3, a high-spirited competition designed to spotlight IBM Business Partners who have developed innovative and cutting-edge social applications that showcase the IBM Platform for Social Business will take place. The applications will span a variety of disciplines and illuminate the value of socially enabling business processes to transform your business.