For 45 years, DARE has been documenting America’s geographically variant vocabularies. Despite the conforming effects of air travel, television and the Internet, neither mobility nor media seem to be able to erase regional patois.

These words are the stuff of DARE, which is supposed to be completed by next year. The first four volumes were published by Harvard University Press, in alphabetical order beginning in 1975. Now, a dozen surviving DARE researchers and editors working in a library building on the University of Wisconsin, Madison, campus are putting the finishing touches on the final volume, “Slab-Z.”

There is also an attempt to gradually  convert DARE to a living document by moving it online

See: The Wall Street Journal