http://mitpress.mit.edu/catalog/item/default.asp?ttype=2&tid=10477&mode=toc (http://mitpress.mit.edu/catalog/item/default.asp?ttype=2&tid=10477&mode=toc)
...for example. (Thanks to Gabriella Coleman (http://gabriellacoleman.org/blog/?page_id=531) for supplying that example; she has also written on this topic.)
-Karl