How the hell did they FB this?

Here is an example of a store feed (shop widget) onto facebook.

I know there are lots of plugins that add the store but I've never seen anything for OC that can add a shop widget as shown here >>> http://screencast.com/t/G2JJhtSB

Anyone know of anything for OC that can do that?

That is part of Facebook's own store app. They are slowing rolling it out to fan pages. It is a pita to add products too though as right now you have to add them manually, they don't use inventory feeds (though you can add an inventory feed in their business feeds, right now, they do not do anything).