Of course there are varieties in American English, but maybe not as many (or as distinctive) as in the UK. Or rather, many American accents (no matter how distinctive) are featured in just about every movie/TV series. I think I hear General American, Southern accent, Ebonics and maybe the "gangster accent" nearly everyday, and that's here in Sweden.
In another thread at HTLAL I wrote:
"Some people I know" tend to judge accents in movies according to this:
*non-rhotic accent - British
*non-rhotic + glottal stops - Cockney
*rhotic tap - Scottish
*non-rhotic + high-rising terminal - Australian
*rhotic tap/alveolar + high rising terminal - Irish
*rhotic - American/Canadian
*"rural" British English (for lack of better description) - usually Irish/Scottish
Not that the above is close to the truth but that's about how some people I know judge spoken English in movies.
I've heard people shout "Wow, that's Irish!" (or Scottish) at any random British film or TV series where the actors didn't sound exactly like Hugh Grant, e.g. Emerdale Farm, Billy Elliott, Brassed Off, Bend it like Beckham, anything by Ken Loach and the list goes on.
What would be the American "Geordie" equivalent?