Using the mobile device to look up bus schedules is an easy and useful concept to grasp, and so the Taipei City Government launched such a service earlier last month.
Although a QR Code is printed on the promotional poster, it is simply a link to http://www.mbus.com.tw, where the user gets to download a Java Midlet that is specially designed to keep track of the whereabouts of the buses in Taipei City. Swiss company BeeTagg also launched a similar service with PostBus Switzerland Ltd last month, except that their mobile tag links directly to the bus info.
This news is already a month old, but I finally ran into one of those posters last week and was eager to try scanning the 2D barcode posted on the bus window. It took less than a second before I realized how difficult the task can be. The bus was not exactly crowded, but I was standing and the bus was moving. On top of that, the poster is positioned on the lower half of the window, so I had to stick out my arm in front of the seated passenger's face to get to the barcode. It must have been a weird sight indeed.
For more detailed news and info: m-bus application screenshots, or if you want to check the Taipei bus schedule on the web: Taipei e-bus system.