This is actually pretty cool! Just go to http://goo.gl/ and type in the URL you want. It shortens it, too. For instance, Brewology's is http://goo.gl/15sx But to make it a QR code, you need to click on View Details next to the link and it'll show the QR code. Brewology's is:
Well, there are a bunch of reasons why people need QR codes, but as for this site, it was just an example. I thought it was really cool when I found out about it and just wanted to share with everyone else.
I am not against them tho I have used them for downloading applications from a cellphone. It was cool for a bit but I found it easier to just do it the old fashion way most of the time.
The programmers you will one day be looking to hire are the ones reading the tech news sites right now.