DigitalHome prints an introductory article on QR Codes in its July 2007 issue.
If you don't read Chinese, no worries. qrcode.es is a new blog that is committed to blogging about 2D barcodes as well -- in Spanish.
The point is, the majority of the general public still needs to be educated on 2D barcdoes, and I'm glad to see some effort going on. There are definitely a lot of mobile barcode enthusiasts out there and here are some blogs and/or articles to give one a head start on this subject, in no particular order:
Rex's blah blah blah (Chinese) - One of the most informative introductions to 2D barcodes and with great industry insight.
The Pondering Primate - Probably the blog that coined the term "physical world connection", always up to date on the latest developments on mobile barcodes.
QR Code Blog (Japanese) - Though discontinued, the blog's attempt at blogging with QR Codes is still quite interesting to see.
All About Mobile Life - Kaywa expert's blog always has something nice to share.
Bar code Insight (Chinese) - Observes the mobile barcode developments happening in Mainland China.
Tommi's S60 applications blog - Developer at Nokia shares views on mobile barcode applications.
GSMBLOG.net - Has an in depth review and comparison of various 2D barcode readers.
David Harper's Different Things - WinkSite founder introduces QR Codes.
BeeTagg Mobile Tagging Blog (Swiss) - BeeTagg's official blog.
streetstylz - NeoMedia's unofficial blog
Make a Difference - Blog by NextCode's director of product management .
ShotCode Blog - ShotCode's official blog.
It's great to see that a lot of people are actively raising awareness on mobile barcodes. Again, there is a lot more information out there, and it's tough to list them all. Remember, search engines are our friends...