DataScience.LA has posted a great recap of the latest LA R meetup, which in turn was a recap of presentations from the useR! 2014 conference. Follow that link to review slides from the event, whith summaries of useR! 2014 related to R and Python; Finance; dplyr; R books; SalesForce and R AnalyticFlow.
DataScience.LA has also posted more videos from useR! 2014, including Joe Cheng's demonstration of Shiny, Matthew Dowle's presentation on data.table and interviews with Heather Turner and Yihui Xie. Go check 'em out!