I love accents, and ever since hearing my father imitate his Yiddish-speaking relatives when I was a child, I’ve attempted to cultivate them for fun. When I was a student teacher at Boston Latin School, I managed to persuade the same ninth grade English students that I was Irish on one occasion, cockney Londoner on another. Lately, after being put in charge of an Australian client for the transcription company I work for, I’ve been walking around the house conversing in an Aussie twang (including the slightly disdainful tone that lurks behind the pronunciation of the word “Ammairrica”).
The Cap’n shared this with me the other night. I thought it was (mostly) very impressive, and she also has YouTube videos up which purport to teach the viewer how to speak in any accent. Okay, I think her South Carolina accent sounds straight out of “Gone With the Wind,” there is an unfortunate omission of the South African (my favorite accent in English) and Bostonian, but the Transatlantic accent (including the dreadful, toothy smile) was perfect.
Shimshonit 
I can vouch for you – Shimshonit does amazing and very funny accents!
Fascinating video. Her California sounded most to me like “unaccented” speech, and the Brooklyn was quite good.
Heather: Thank you, my dear. And g’day, luv.
Michael: Now, see, I thought the Seattle sounded less accented than the LA, but I was born in Seattle and always considered the Northwest unaccented. (Actor Tobey Maguire speaks perfect Oregonian. Listen to his Rs.) When I transferred to the Northeast for college after being in LA for a year and a half, everyone there pegged my accent perfectly. (Unaccented it was not.) Friends from Newton who live here now say that the “unaccented Midwestern” accent is not Minneapolis (which I could have told them) or Chicago, but Omaha. Sounds right to my ear. Glad she got your stamp of approval for the Brooklyn; you’d know.