BARCELONA, MOBILE WORLD CONGRESS 2012 — This year I decided to cover the Mobile World Congress without a computer. Or at least, without my MacBook. I live in Barcelona, so I knocked out a couple of posts on my iMac when I was at home, but on the show floor and in the press lounge I relied solely on my iPad. And amazingly, it was up to the task. There are some annoyances, but with a combination of perseverance (or just stubbornness) and the right apps, I got a pretty easy system going..