This blog post by Colin Eberhardt describes a Windows Phone 7 NavigationList control - a list control designed for navigation pages.
Source: ScottLogic
A few months ago I blogged about the relative performance of the Windows Phone 7 emulator versus the same code being run on the real hardware. There were a couple of take-home messages from this blog post, firstly the performance on real hardware is typically much slower than the emulator, and secondly an ItemsControl can render the same content as a ListBox in less time, making them a better choice for rendering lists of items for navigation.