How we had wished there was a Google Analytics SDK for windows phone and windows 8! The ease of a Google dashboard, the amount of info that it gives, the integration, is way superior as compared to the other analytics tools available in the market.
and here is a GoogleAnalyticsSDK available in Codeplex. Works perfect and well documented! (An unusual combination :P)
Integration is a piece of cake!
May the code be with you! 😀