IPhone: Integrating Merchant API Payment Processing (Real Goods)

I've been doing research on an application that will sell real-world goods/services. After reading the rules we cannot use the 'in-app-purchase' model and must integrate (so it seems) with a 3rd party merchant service for credit card processing. This is good because apple's fee (30%) is pretty high.

So my question is - have you integrated with a specific merchant payment processor system that worked well with the iphone?

I know paypal has their thing - but i'd rather have the user store their credit card info in the app to make purchases.

Example app: http://s开发者_如何学JAVAplickit.com/ (someone who is doing this)

your feedback/comments appreciated.

From Splick-it's FAQ: "Splick-it does not store credit card information on the phone itself. All credit card data is passed through to a secure, PCI-compliant payment gateway, who simply returns a thumbs-up or thumbs-down when a customer attempts to use that card to pay for a Splick-it order."

As other people on SO have also noted, storing the card details in an app may open you to problems with PCI-DSS compliance, which is going to be the main issue when you do anything with card payment.

Might be worth contacting Splick-it to ask them which payment processor they went with.