This article from The Guardian talks about how in Japan shopping via the mobile - m-shopping - is becoming the new craze.... read on:
"Hitomi Terada is in the mood to shop. The 18-year-old has no credit card and very little cash on her, but that doesn't matter: all she needs to shop at her favourite mall is the mobile phone that rarely leaves her sight.
A few seconds of tapping away at her handset, and she can be the owner of the latest brand-name bag or boots. Two or three days later the goods arrive at her home, along with the bill, which she pays at her local post office."
Full article here