The document describes a Big Data workshop held on March 10, 2012 at the Microsoft New England Research & Development Center in Cambridge, MA. The workshop focused on using R and Hadoop, with an emphasis on RHadoop's rmr package. The document provides an introduction to using R with Hadoop and discusses several R packages for working with Hadoop, including RHIPE, rmr, rhdfs, and rhbase. Code examples are presented demonstrating how to calculate average departure delays by airline and month from an airline on-time performance dataset using different approaches, including Hadoop streaming, hive, RHIPE and rmr.