Microsoft has announced that they're jumping onto the mobile tagging thing, having developed a system of High Capacity Color Barcodes that encode information in tags smaller than those allowed by QRCode
and Datamatrix formats. Additionally, the specification has been designed to work with out-of-focus and fixed-focus cameras, making the thing more feasible for cellphone use. Although the "humanities" angle is kind of cute -- the company is rightfully stoked over the fact that HCCBs were on exhibit at MoMA in New York -- this is clearly aimed at organizations looking to sell more people even more useless junk. Hooray for conspicuous consumption!