Microsoft’s Windows Live Barcode site touts using Denso’s QR Code. QR Code is a 2d matrix barcode that can store more information than other kinds of barcodes currently in use. Microsoft’s website lets you create a QR Code barcode (you can see mine here) and says they will provide a reader for handsets to use them. However, the site does not have any download just yet. QR Code has been around since 1994. It will be interesting to see if it finally catches on because of this apparently new push from Microsoft.