I want to briefly share my experience with Gravity Forms. I'm a cheapskate, so I tried it before I bought it. I loved it so much I just had to buy the Developer License. So far I've used it for regular forms, online payments, and even a custom WordPress user registration and 'graduated access' setup. Gravity Forms is a GREAT plugin --- it is so capable, and looks so good, I don't see myself ever going without it! Keep up the good work!