The Winter 2012 edition of Sybase's Financial Services Viewpoint newsletter includes two articles related to R.
The "Industry Insight" article "R is Hot" (written by yours truly) is a one-page summary of the R phenomenon: what it is, how it's used, and how it's revolutionizing data analysis.
The "Industry Insight" article by SAP's Melinda Wilson, "R swings the pendulum for profit" is a summary of the research by Mike Kane and Casey King into the 2010 "Flash Crash" of the US stock market.
Both articles are available for download from Sybase at the link below.
Sybase: Financial Services Viewpoint: Winter Edition 2012