iPhoneOS 2.0 takes drastic steps to ensure applications can not run on top of SpringBoard without SB launching them itself. What does this mean? Stack is impossible to implement on iPhoneOS 2.0 until we find a workaround. And yes, the project still exists, don't worry. I don't have as much time to devote to it as I wanted, but I am determined to find a way to get Stack running on 2.0. Sorry for leaving everyone hanging! Source: http://code.google.com/p/mobilestack/ Im not the developer by the way. Just giving the heads up.