If you go back to my post about E-commerce Structure – Why Taxonomy Matters it will cover some of the things Matt talked about around 02:22 of his video. Follow my gist at the end of my comment to learn how to create the sameAS attribute of your schema markup.
The embedded post seems narrow and small to me. Click the [ ] to expand full size. If your cart doesn’t support Rich Snippets, contact me. I’m sure I’ll have resources to share. And, if I don’t, support me and I’ll do the research as long as I can license the content under the creative commons license to allow others to expand upon the concept.
To make my illustration in that video comment, I went to http://schema-creator.org/ which is an awesome resource to wrangle your mind around schema markup. They did not have the sameAs attribute.
And this is how it will appear => http://www.google.com/webmasters/tools/richsnippets?q=uploaded:8004f61908bdf92e34e8e2a1ddb825d7