sales tax

I have written (edited) a module (example module in addressfield module) to allow NC residents to select their county in the checkout process, in D7 Commerce, in order to apply the appropriate sales tax*. In the process I have written rules that apply the tax and exported them such that others could paste them into a rules component. I was wanting to make it available for anyone who is building D7 Commerce sites for companies in NC. Is this Drupal worthy? With about an hours worth of editing it could be turned into any other state that charges sales taxes in the same manner.