When i filed to become an LLC, I hired a company to do it for me... but the services were *FREE* for a week, so all I paid were the fees! (I am thrifty.) One of the add-ons was that the company would apply for and obtain your tax I.D. number for you, which enables you to purchase wholesale and without taxes.
This is the biggest rip! The link to the government site is right here, you can do it online and it takes less than five minutes. You're assigned your number right away and can download the official letter in PDF to print right away.