Accents in English: All aboat moases in my hoases

Over on Slate, there is a fascinating article about how local accents in North American English are still on the move. Meanwhile I'm always amused when people ask me if I'm Canadian when I let a Virginian "aboat", "hoase" and "moase" slip out. But then again I'm probably a dying breed. And if anyone claims to not have an accent, I will smack you with a dead ghoti.