Here is an interesting project that allows testing some of the latest products and platforms available for web development on Windows. It is called DinnerNow
From official site:
DinnerNow is a fictious marketplace where customers can order food from local restaurants for delivery to their home or office. This sample is designed to demonstrate how you can develop a connected application using several new Microsoft technologies.
The demo utilizes several technologies including: IIS7, ASP.NET Ajax Extensions, Linq, Windows Communication Foundation, Windows Workflow Foundation, Windows Presentation Foundation, Windows Powershell, and the .NET Compact Framework.
The DinnerNow sample application is now available for download. You can download the entire DinnerNow sample code from CodePlex.