I just purchased the developer license and I am playing with the PayPal add on. I was wondering if Gravity Forms itself uses the PayPal add on on their own site? I like the price tables with the "Buy Now" feature that opens up PayPal cart in a pop-up lighthouse or Ajax window, and would like to replicate that for my client as they are only selling memberships (client is a health club). Is there a tutorial or anything that will help me to replicate what you (Gravity Forms) are doing with your own PayPal solution? Any advice is appreciated.