The Book Data Mashups in R gives a short tutorial using R to pull data from the web and analyse it. The specific presentation is looking at foreclosure auctions in Philadelphia. I used this book to get some practical hands on exposure to R. It happily fulfilled this use case for me, exposing packages in R, and helping me gain an idea of how R can be used. It also provided a good idea as to what R does well, helping me know when to pull the R tool out of the shed.
I recommend the book to experienced developers who want to get their heads around what is possible with R and how R works by trying it out.
[this book was reviewed as a part of the O'Reilly Blogger Review Program]