American Languages

http://csumc.wisc.edu/AmericanLanguages/

This website is a project of the University of Wisconsin in partnership with The Max Kade Institute, the Center for the Study of Upper Midwestern Cultures, The Dictionary of American Regional English and the Institute of Museum and Library Services.
It contains speech samples of 8 American States (Illinois, Indiana, Iowa, Michigan, Minnesota, North Dakota, South Dakota, and Wisconsin) and their respective counties. Each sample is accompanied by a brief commentary on the biographical information of the speaker as well as a transcription of the recording. There are parts that are being constructed but the main goal is to have samples from every county in every state in the United States, collected from interviews conducted by fieldworkers for the Dictionary of American Regional English. In these, they have 844 examples of speakers from different locations, gender and age reading Arthur the Rat that can already be consulted in the Searchable Database available in the site.
The most interesting feature of this website is that it also contains speech samples of Germanic American dialects, such as the Amish Swiss German, Texas German, Pennsylvania Dutch, and many more, as well as essays on the history of such dialects and information on where they are spoken in the US.
There is also a link to Native American Languages, but it is still under construction.