When the XBOX launched, I was about 18 deep at Walmart at 5pm on Clinton Hwy.
Not sure how it's going to be this time around. I've been reading reports of BB having anywhere from 30-200 for sale.
Probably best to try and find out how many will be available. Best Buy is supposed to do some sort of ticketing system starting at 9:30pm (at at least some stores). I would imagine people will be there that morning or early afternoon.
Let us know if you find out any stock numbers if you're in Knoxville. I'm interested in buying an extra or two...