Physical World Connection gets a big boost.
Nokia starts offering the ability to create and read Mobile Codes. Microsoft offers
the ability to create your own 2d codes too. Recently the largest consumer good packaging company in the world
announced they would be placing them on packaging.
I think the chicken and egg are pretty much covered here. To complete the loop, a social network site should starting offering the ability to create and scan 2d codes too. Let the targeted demographic determine the creative applications for these codes.
The quicker consumers and corporations can create their own 2d codes (physical world hyperlinks) through a universal platform, the quicker PWC gets adopted.
On Nokia's
Beta Site , they are offering the ability to
create a 2d code (Mobile Code), and several
software applications (downloadable), that allow you to scan the Mobile Codes with a Nokia camera phone. If you have a Nokia N93, N93i, N95 or E90, you will find the Nokia barcode reader preinstalled on your device, ready to scan mobile codes around you.

If the carriers that work with the compatible Nokia phones were smart, they would start offering the ability to create Mobile Codes (physical world hyperlinks) on their site.
If I am Nokia,
I would be looking for sites that allow individuals to continuously generate content. Know which ones I would target first?
Can you see how Google could incorporate 2d code creating ability into their advertising mix?
What are 2D codes?
'Mobile codes' are in fact 2D codes, two-dimensional codes that can hold much more data than ordinary barcodes - linear 1D codes - due to their matrix structure.

The Mobile Code for The Pondering Primate.
In what format are the mobile codes I have created?
We like open standards: the two currently available open-standard formats for 2D codes are Datamatrix (DM) and Quick Response (QR). Our site uses currently the Datamatrix standard. Some of the readers proposed on this site can read QR codes as well, including the Nokia barcode reader
Learn more about Nokia's Mobile Code project