Update (2014/12/24): the rmarkdown package has made this much much easier, so you should probably ignore this page. Please see http://rmarkdown.rstudio.com.
Here is a simple demo of making DZslides with knitr and pandoc:
pandoc command mentioned in the slides to get the HTML output. Use
Left/Right arrows to navigate through the slides.
Also see slides made by other users in the showcase page, e.g. Gaston Sanchez.