Windows Phone 7 has the MpnsRecipe NuGet package which you can use to send push notification messages to the Microsoft Push Notification Service (MPNS) on the server side. However, this package has not been updated for Windows Phone 8.
http://nuget.org/packages/MpnsRecipe
What is the equivelant for Windows Phone 8? I want to make use of the new wide tiles but I can't find any code online to get me started. All I can find is the XML format for the new messages on MSDN and I'd rather not have to write my own if there is a ready made package available.