I wasn't sure where to post this -- but it's a really fascinating survey of regional (U.S.) differences in pronunciation and word usage:
Wow, loved this post, thanks for that!

I'd like to see a study mapping the convergence of accents over time, globally.. to see if that's actually happening or not.
Very interesting indeed!
Students: Are you brave enough to let our tutors analyse your pronunciation?
Thanks! A lot to learn.