Real world goods in iPhone app?

I've seen questions asked here before, but they do not address the issue. That said:

"In App Purchases" spec开发者_JAVA技巧ifically may not be real world goods or services, according to Apple's guidelines. What services allow integration with iPhone apps so that I can use ObjectiveC to sell things in an iPhone app?

In other words, how can I sell stuff in my app and not use a website or integrated UIWebView?

The only process I can think of would be something like using an e-commerce app like Magento or Shopify and using the API to pull the product data, and then make HTTP requests to the site to simulate the ordering process.