James Hudnall (who, by the way, writes great comics) links to a quiz that analyzes your dialect. It's specific to US English. The quiz name is Are You a Yankee or a Rebel?; but it's more region-specific than that. Time and time again, it traced my language back to the Great Lakes region, and even specifically to Michigan.

To real linguists, this is probably no big news; but I like how well it's implemented. I find it to be a step above many online "quizzes", both because it's based on real science, and because it actually analyzes your response to each question live as you answer.

Oh, and my results? "36% (Yankee). You are definitely a Yankee." I hope my clients in Atlanta don't mind!