Is there a way I can get a Windows 7 Phone  UI on my Android device?
There is an alternative launcher that purports to give the look-and-feel of Windows Phone 7. I can't imagine it's more than "skin-deep", however.

Some information (and a video) here: http://phandroid.com/2010/12/09/turn-your-android-phone-into-a-windows-phone-7-with-this-metro-ui-launcher/