Now even before the official public release of iOS 4.3, iPad magazines using the new billing system, announced earlier today, have started showing up in the App Store. We’ve listed three ultra popular ones below, Popular Photography is a particular favorite of mine, not least as a previous contributor, I know how good this magazine is. Popular Science is also great and becoming more and more popular and of course Elle, who doesn’t like that? $2.99/download $2.99/Download Free/Download