i recently saw some videos on F#. it seems it used mainly for Service or Classes only? i see no \"F# WPF\" app in VS2010 Beta?
With F# 3.0 and the XAML type provider it's possible to create a WPF designer for F# in Visual Studio 11. See http://www.navision-blog.de/2012/03/22/wpf-designer-for-f/