Microsoft Tag is an effort to give printed publications and signs a way to directly link to online content.
Gotta love those tags
Reminiscent of the old CueCat, Microsoft Tag technology uses a two-dimensional bar code to link a print publication to online content. Tag, though, uses a cell phone's camera, rather than requiring a separate gadget.
The splotches in the Microsoft Tag bar codes can themselves be customized, such as this one made of hearts for a wedding magazine.