Since this is my 1st post here, I thought I'd start if off with a contribution. I live in N.C. and this is our tax free weekend as well. Last night I went to Apple's website and purchases an iMac.
While in the cart and during the checkout process, the sales tax remains. But when you receive your confirmation e-mail from Apple, the sales tax has gone away. It's now zeroed out.
Hope this helps folks in other states having their tax free holiday.