I have an article up at Peachpit on using iOS in the kitchen:
Using iPads and iPhones in the kitchen may seem a little odd at first, but it’s a natural progression. You might start by using the iOS Notes app to create grocery lists; then you use apps to discover and save recipes. That leads you to enhanced cookbooks and dedicated recipe apps that are designed to be readable and functional in the kitchen. To make it easier for you to cook with iOS, I’ve become a kitchen pioneer, testing iPad and iPhone apps and tools designed for cooking. This article describes some of the best cooking apps and tools I’ve found in my explorations.