A new UI library for Windows Mobile .net Compact Framework has been released, named 'Silvermoon'.
Silvermoon is described as an "Open source library which allows you to add iPhone-like user interface on Windows Mobile apps. It looks incredible
You can read more about Silvermoon but you really need to take a look at the YouTube video cos it paints a thousand words!
This is the first beta release of Silvermoon, a collection of windows mobile compact framework 2.0 controls to build modern user interfaces with transitions, alphablending and other effects.