BeeReader is a new QR Code (or Semacode) format that has alot going for it right now. It reads QR and DataMatrix codes and has it's own format that can scan from about 3 feet on a computer monitor. (BTW, that's impressive.)
It's internal format supports URLs, feeds and contact info from it's web builder, and has pretty tight integration (at least on the Palm OS) to the Web browser and contact tools.
The image above is my RSS feed.