A very entertaining and informative account by Christophe Lalanne of his pursuit of biplots from a question about display using Lisp to statistics with R.
Entertaining for professional researchers, who experience the joy of one source unravelling into another on a daily basis.
Instructive for those not yet professional researchers, by demonstrating the riches that await just beyond where most people stop searching.
And not to mention a wealth of pointers to resources on biplots.