Updated: Top 10 business apps for iPhone

IntroductionWhen Apple launched the iPhone, many people in the business world – including Microsoft's CEO at the time, Steve Ballmer – sneered at it. It didn't have a keyboard, was expensive, and didn't even have 3G in its original form. A lot has changed since then, and the numerous updates and tweaks that Apple has made have turned it into the perfect on-the-go smartphone for business.The App Store is the main driver behind the surge in productivity on Apple's mobile devices, but i