I have been seen a square coding on Japanese blogs for years now. I knew it is some kind of barcoding system but imagined it only works with Japanese mobile phones....but I was wrong. Many phones, including my sonyericsson K800i, are able to read the barcode once Kaywa reader (java application) is installed and as long as it is a camera phone. Reading the barcode is not as easy as I expected but it works! No more fiddling with URL typing into mobile phone. Scan the code and straight to the site. Brilliant!
clipped from reader.kaywa.com