A Mixed Media Reality (MMR) system and associated techniques are
disclosed. The MMR system provides mechanisms for forming a mixed media
document that includes media of at least two types (e.g., printed paper
as a first medium and digital content and/or web link as a second
medium). In one particular embodiment, the mixed media document may also
include hotspot images that uniquely identify a user associated with the
mixed media document. Such individualized mixed media documents are used
to identify users of the mixed media document, when orders for products
or services are made using the mixed media documents through the MMR
system.