I just rode by some local(Raleigh/Durham) stores and this is what I found.
AT&T
6:20am
about 20 people in line
Sprint
6:30am
no people in line, 2 people waiting in their car
Verizon
6:30am
no people in line, 1 person waiting in their car
Best Buy
6:35am
no people in line
Radio Shack
6:35am
no people in line
Looks like it will be easy to get a phone today.