I stumbled across something interesting. Below is a little widget provided by Amazon.com. Imagine a business report viewer widget which operated similar to the control below. This is similar to the iTunes prototype control I put together.
If you look at the web page which provides information about the control, you can navigate to a page which explains some of the metadatawhich helps power the control. None of this stuff is magic. Imagine trying to put something like this together without product IDs or other metadata.