QR Fever

I have been seeing these things around and thought that thy were nothing more than what FedEx and UPS use to make it easy to scan their packages from all directions. That may or may not be the case, but when I saw one on a jumbotron in Times Square last weekend, I knew something was up. I did a little searching and now I'm drinking the Koolaid, I've downloaded the app and I'm making the change to my business card. Is this cool or what?