http://mashable.com – In honor of Mashable’s five-year anniversary, this series is supported by IDG. Join social conversations to market your brand with IDG’s social advertising platform, IDG Amplify. Learn more about how it works here.Five years ago, the mobile landscape was in many ways, a world apart from where we are now. The Motorola Razr was on its way to breaking sales records worldwide, the SideKick II was Paris Hilton’s best friend, and the BlackBerry was still all about business. While smartphones existed, the devices were really more like PDAs with a phone built-in rather (General)

