(This article was first published on is.R(), and kindly contributed to R-bloggers)
Here, both for the sake of posterity, as well as example, is an embedded Gist that describes how to embed a Gist in Tumblr:
To leave a comment for the author, please follow the link and comment on his blog: is.R().
R-bloggers.com offers daily e-mail updates about R news and tutorials on topics such as: visualization (ggplot2, Boxplots, maps, animation), programming (RStudio, Sweave, LaTeX, SQL, Eclipse, git, hadoop, Web Scraping) statistics (regression, PCA, time series,ecdf, trading) and more...

Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).