I spoke at the Special Interest Group on Computer Science Education (SIGCSE) on Windows 8 and Windows Phone 8. As part of the talk I also built to apps. One for Windows 8 and one for Windows Phone 8. I am happy to say they are both live in their respective stores. I share more soon about what I learned while building them. In the meantime, here are the links.
Windows 8 Weather Man-Chicago http://apps.microsoft.com/windows/app/weather-man-chicago/e2c22bca-2aba-460a-967e-099259ff5035
Windows Phone 8 Weather Man-Chicago http://www.windowsphone.com/s?appid=6a535008-374e-4965-8fea-bdb72e392eb7
These are hand crafted XAML/C# apps. These apps use government weather feeds/services to provide observed weather and forecast weather for Chicago (could be generalized to any city in the US).
I am happy to say that I used Portable Class Libraries (PCL) to make pretty much all none UI code reusable, I used the basically the same XAML in both (shocking right!-only 6 changes in the XAML) and after my talk and more polishing (adding app bars to both and such), screen shots, image building, both apps are in their respective stores today). I didn’t do MVVM, so that is an area for future consideration.