Day-em. An ah thote yuall'ed be pleeyuzd with thuh caampluhment.
To find as twangy an accent as that you'd have to travel to the deep South: South Carolina, Georgia, Alabama.
I'd say that the US has about 8 distinct genres of accent: far North-East, Boston, New York City, ghetto, Wisconsin, Midwest, mild Kentucky twang and deep South.  
The Midwestern accent is the dominant one.  It stretches from Pennsylvania all the way to California.  Florida, being a largely transplant population also has a fairly Midwestern accent.
The "Wisconsin" accent has a Canadian flavor and includes Minnesota as well.  Detroit also has a hint of this accent.
To find the "ghetto" accent just go to any city's downtown area.
Does anyone agree with this or am I just crazy?