I recently wrote about state-wide sales tax holidays for my About.com site. Here's a blurb:

"Every year several states let buyers purchase back-to-school items tax free. This can be the perfect time to stock up on school supplies or purchase a new computer.

Each state has its own spending limits and sale dates. Georgia, for example, lets students make computer purchases up to $1,500 between August second and fifth. North Carolina allows students to purchase tax free computers up to $3,500 between August third and fifth."

Check it out here: School Supply Sales Tax Holidays.