Found this today, interesting, but not sure how useful it is.

I like the idea of exposure to different accents, but I don't know how useful it is only hearing one speakers voice from each country.  Also, from my travels to Panama I've noticed a great variety of accents even in that small country.  People speak differently or in contrasting manners such as urban vs. rural, formal vs. informal, educated vs. not-educated, etc..

I'm going to write a post on accents soon, but I think It's also useful to look at the phrases people use regionally.