Japanese company, Cross Borders Inc. made a cool way to create your own QR code.

Type in a URL and an army of small robots comes to build the code for you.

If you haven’t seen a QR code before, I’m not surprised. They’re much more popular outside the US, especially in Japan where they’re getting ubiquitous. They’re basically a 2D barcode, encoding a string (in this case a URL), with some error correction built in. They can be optically recognized, and are most frequently captured by snapping a picture from a mobile device The device can take action using the encoded string, like launching the web browser and heading to a URL.

So you can do things like run billboard ads with QR codes that take people directly to a mobile ad or coupon.

I found this via Asiajin - and check out the reference to Winksite there too! My opinion is that Winksite is the best example of QR codes being integrated into a mobile web product right now.