This is an opportunity to hear speakers in UserR Groups in the U.S. and from great speakers like Ryan Hafen, Hadley Wickham and Nick Elprin nevertheless! The video is hosted through Air Mozilla.
Ryan Hafen provided an overview of the Tessera project, an open source environment for deep analysis and visualization of complex data sets. Hadley Wickham presented on pipes (%>%) and the virtues of creating simple and predictable functions that can be combined easily. Last but not least, Nick Elprin presented on parallelization on R. Links to slides can be found here.