I created a 40-minute video tutorial introducing Hadley Wickham's excellent dplyr package, and posted the walk-through document used in the video on RPubs.
Numerous people asked me for a copy of the source document to adapt for their own purposes, and I'm happy to oblige! View the R Markdown document here, and then click Raw to view a plain-text version that you can easily save. (Or, just clone this repository!)
More information about the tutorial is available on my blog.