I'm definitely going to purchase Gravity Forms for my e-commerce site provided I can do the following:
I would like for the user to be able to enter a Groupon code in a Gravity Form field and have that field data validated against a database of coupon codes provided to me by Groupon. Can this be done?
For example, the customer enters their name, address, and the Groupon code they received from their Groupon purchase and the form checks the database to see if the Groupon code is valid. If it is, the form is processed. If not, there is a notification method saying the coupon is invalid.