Twitterrific is the grandaddy of iOS Twitter clients -- it existed on the iPhone before there was an SDK and was in the App Store on launch day, and again for iPad launch. Twitterrific has evolved from a reader-centric experience to a feature-full client and back to a highly focused app.
Craig Hockenberry, a principle at Iconfactory, the driving force behind Twitterrific, spoke to me at WWDC 2010 about getting Twitterrific ready for the iPad and how that process re-informed what will be going into (and perhaps coming out of) Twitterrific 3.0 for iPhone.
Hockenberry has also taken a turn as author, with his iPhone App Development: The Missing Manual now available from O'Reilly. It takes you through the process, from SDK signup to Xcode and Objective-C, to deploying an app. It's a treasure-trove of experience and insight for developers -- aspiring and veteran alike.
Videos after the break. (Huge apologies to everyone, especially Craig, for the annoying wind noise -- I greatly underestimated it during filming)