I had the pleasure of meeting the creators of Thinglink last week, Ulla-Maaria Mutanen and Jyri Engestr√∂m. You may recognize Ulla as the writer of the Craft Manifesto. Thinglink is basically a product code, but serves as the conduit of meaning between things and people rather than things and corporations. Apparently the idea arose after having a few drinks with Jimbo Wales, which is the clencher for a good social web story.
Here is a post about the concept behind Thinglink:
A thinglink is a free unique identifier that anybody can use for making the finding and recommendation of particular things easier in the Internet.
A thinglink identifier is based on the idea that many of the things we use in our daily life are quite particular. Perhaps we know their origin (who has made them, when and how) and something about their history or previous use (like with furniture and cars). Some things have more meaning to us than others.