OK, you YARTophobes, the bit about "where in the US have these vowels merged" is still unanswered, and I'm not in the mood to look for it. Instead of making fun of me you could get your Googlers out and get working!

I was just pointing out a possibility, and slightly miffed that Jackie insinuated that those of us who don't differentiate between those vowels are pronouncing things improperly. [pout] I say, when a whole group of people pronounces things a particular way, then it is the right way for them! I will never be able to casually make my mouth all pointy the way you need to to pronounce awful, hawk, dawn, etc., with different vowels than the others!