I've been an avid Mac user for years now and an iPhone/iPod Touch user for a year. 2 things: I'd love to create my own apps, catered from my interests, in hopes others would enjoy them but mainly for personal use. And secondly would love to sell apps within the App Store. What do I need to do to be able to create my own apps to sell and how to create them? Is it easy? A lot of work and/or knowledge required? Along what lines?