Interactive map of pronunciation and use of various words and phrases differs by region in the US.
Based on Bert Vaux's online survey
of English dialects, the program allows you to see results for individual cities, as well as nationwide (though inexplicably it does not include Alaska or Hawaii).
The Northern Cities Vowel Shift is radically changing the sound of English:
Despite fears that the growth of TV and radio would homogenize English dialects in the US, the Great Lakes region (from Syracuse to Milwaukee) has been in fact diverging with respect to how people there pronounce English words. Rob Mifsud writes: Consider the three-letter words that begin with b and end in t: bat, bet, bit, bot, and but. All five of those words contain short vowel sounds. Their long-vowel equivalents—bate, beet, bite, boat, boot, and bout—arrived at their modern pronunciations as a result of the Great Vowel Shift that began around 1400 and established the basic contours of today’s English. But those short vowels have remained pretty much constant since the eighth century—in other words, for more than a thousand years. Until now. [more inside]