Well, to make my girlfriend happy, I'm going with The Galleria. She can shop while we wait. I hear (and believe) that the Apple stores will receive hundreds of phones, so my plan is to go hang out at The Galleria and every so often check the line at the Apple store. Just before it gets ridiculous we'll get in line.
If the line is crazy by noon when we first get there, then I'll just go to an AT&T store.