Yale's Grammatical Diversity Project is compiling data on the grammar of many varieties of American English, and they are creating a complete database of their studies. Here is the article. Here is a link to the database.

Some examples are:

Those are worthless anymore. (meaning "these days) - Midwest

Are you done your ice? - Canada

Here's you a spoon. - Louisiana, Texas, Tennessee, Kentucky, and Utah

I ain't never had no trouble with none of 'em. - Florida (Talk about double negatives!)