I think this would be pretty easy to do with gpplot2, but Portfolio looks like its worth checking out too.
A somewhat hard-to-find-but-useful set of ggplot2 examples buried on Hadley Wickham's site.
Combination example code for common things and tutorial.
I've only read through the chapter on transformations but this seems likely a truly excellent resource. Gratis for personal use.
Nice sort of R thesaurus for other statistical software.
Awesome tutorial with loads of examples, code samples, and graphs. Amazing resource.