I'm getting mine at the Best Buy on the way home from work. I'm going to bet that they are also doing the 5pm thing. I don't know for sure, but it would be a shocker if they didn't.
My plan is to stop by there on Thursday the 10th and talk to the guy to get an idea of how many they have, what he anticipates the lines to be, etc... and then to maybe leave a little early on Friday to try and get there by 4. If that's not enough to get one then I'll just wait. I'm not going to line up for more than an hour. I have a personal limit to what I'm willing to do for things like this.