For those of you who are interested in R, but not necessarily the programming aspect of it, this presentation teaches you how to install everything you need to use the graphical user interfaces (GUIs) to R.  If you really are interested in the programming aspect, you may want to read this presentation anyway since, as a programmer, you may have to interact with the non-programming users of R.  Click on the following link to view the presentation: Non-Programming Introduction to R.