Nice looking app. I stopped at the part where you asked for a credit card. I am not sure if I can trust you with that info. Great job though and I'm glad you're delivering happiness in SF.
We actually just have a version under review that allows you to skip the CC entry during registration. ;) However, we use Stripe to store your Credit Card details.
Great idea and beautiful UI. I sent chocolates to a friend in SF. I'm a little sad he got an email notification, though. I was hoping it would be a surprise.