I think every single one of us could share a frustrating online shopping experience, especially one about trying to find a product you know a retailer offers, but doesn’t show up in their search results. Google wants to make it easier for all of us with their new enterprise offering, Google Commerce Search.
To participate, you submit all your data to Google Merchant Center and Google Product Search (via data feeds, direct uploads or the API), and then customize the look and feel of your search engine with Google. Although Google doesn’t mention this in the documentation, I can only assume you have to do something to incorporate the Commerce Search into your site (probably replacing your old search engine). (Oh, and PS, it starts at $50k/yr.)