Dialect Map of American English

http://www.geocities.com/yvain.geo/dialects.html

An introductory website, it gives basic definitions of dialect, idiolect, pidgin and creole. It presents a map dividing the US territory into 26 American English dialects. The dialects described are: New England Eastern, Boston Urban, New England Western, Hudson Valley, New York City, Bonac, Inland Northern, San Francisco Urban, Upper Midwestern, Chicago Urban, North Midland, Pennsylvania German-English, Rocky Mountain, Pacific Northwest, Pacific Southwest, Southwestern, Hawaii*, South Midland, Ozark, Southern Appalachian, Smokey Mountain English, Virginia Piedmont, Coastal Southern, Ocracoke, Gullah, Gulf Southern and Louisiana) * Hawaiian dialect is described but not featured on the map.
Although the website lists a considerable number of American dialects, the information provided for each of them is quite general and presents few examples of defining linguistic features. Also, there are no recorded samples of the dialects.