Over the past decade, I’ve been involved with many projects to “de-tangle” digital marketing for big companies. Big companies want to know what’s out there in the digital landscape, and how it all fits together. Most importantly, they want to know why the latest trend is important to them. Take Twitter, for example. Is it a real, honest-to-goodness life changer that will be used addictively by a whole generation of digital influentials? Or, will it be the Segway scooter of web 2.0, a tool in search of a solution, that enjoys a surge of activity followed by a slow decline into boredom and malaise? I won’t comment on Twitter (at least not for now), but I will mention a truly cool tool that could be very, very important for B2B marketers. QR codes were invented in Japan in 1994 and are used a lot in Asia. They’re all over the place in India. The basic concept is simple—a mobile two dimensional barcode. Instead of putting barcodes on merchandise for use in payments, you can put them anywhere.…