If you own iPhone and miss those Windows Mobile functionalities, then this is for you. Norwegian programmer has created an application that allows you to run the Windows Mobile operating system on your iPhone.
Here is video of Erik Kristiansen (Programmer) showing app in action at myPhone 2008 convention in Las Vegas.
This application is currently in beta stage and soon be released as a open source application. It operates similar to Apple's Bootcamp allowing you to chose either the iPhone OS or the Windows Mobile OS when the iPhone boots up.