I plan on getting there about 1/2 hour before opening; was there last year and it wasn't bad. I think I'm going to a nice one that's NOT off a highway. I imagine people would hit those on their way somewhere else.
The fact that it's an 8GB might help keep people away, and also TRU has a similar deal that might limit traffic. I'm not really sure, though. If I get the iPod Touch, great. I think I will also get a couple iTunes gift cards and maybe a Wii game but I'm not sure yet.