Although QR (quick response) codes have been around since the mid-90s in Japan (born from manufacturing), they have only recently come into the mainstream consumer's focus. Japanese mobile consumers are using these codes along with special software and their phone's camera to shortcut having to type information into a mobile browser. (The QR code to the right is the URL for this blog in QR symbology.)
These codes are creeping up online, in magazines and newspapers and even on TV to allow users to quickly jump to their website or share a host of other information. All a person has to do is point their phone at the code and it knows what to do, taking the user to the end destination. See for yourself and create one using this generator.
Realistically, the success rate of something like this in the US is going to be equally proportional to the number of US mobile subscribers who use mobile web. Right now that number is low (but growing). Without a support base of subscribers who find entering information into their phones difficult, this could go the way of the Cuecat.
Here is a video of it in action, you may not be able to read what it says, but you'll see how it works.
Competition is out there (see this post on Engadget) and although QR is an ISO standard, it is not a universally agreed upon convention. Interesting to note, there are also 3D versions of these codes which are capable of storing 1.8Mb of data. That could be a document, small music file or short video clip. Imagine the possibilities. Walk into a store, see a CD you like, scan the code and possibly listen to a clip of the track right there.