We've been doing a combined demo in our dev camps recently, which is a shopping list application that works cross platform (Windows 8, Windows Phone and Android) with a Windows Azure Mobile Services backend.
The source code is posted on GitHub: https://github.com/sabb0ur/ShopingListFinalDemo
We'll be following this post with detailed explanation of how you can recreate this app.
Note: This post originally appeared on my MSDN blog at http://blogs.msdn.com/b/africaapps/archive/2013/05/09/the-cross-platform-shopping-list-demo-with-a-windows-azure-backend.aspx