JAGS

Looks like JAGS 4.0 is out.

Supercharge R with Spark: Getting Apache's SparkR Up and Running on Amazon Web Services (AWS)

Very useful introduction here.

SparkR quick start that works

Simple but useful, here.

Emacs key bindings for Rstudio

The preview version of Rstudio (0.99.646), which is stable enough for daily usage, finally implemented an Emacs key binding.

Nimble 0.4 is out

Quite a number of new features. More details here.

New package "dplyrr" - Utilities for comfortable use of dplyr with databases

This package is potentially useful for big data analysis.

rbokeh - R Interface to Bokeh

This new visualization package looks really promising!

Introductory R Markdown: dynamic documents and reproducible research for beginners

Good tutorial here.

Three-way crosstabulation using R

Here is one way to do it.