I shouldn't be reading this thread. I just finished my linguistics class.
But anyway . . . FYI, speaking of US accents, look here:
Do You Speak American? (PBS)
The official US dialects are: West, North, Midland, South, Mid-Atlantic, and New England.
Personally, I'm kind of straddling the isogloss (ooh, a term from class) between Midland and South.
Our linguistics teacher showed us a really funny YouTube making fun of Pittsburgh, called "Pants n'at."
