This is the demo I made for the Microsoft Demos Happen Here competition. The criteria was that it had to be under 10 minutes, and show one or more of the features from the launch wave technologies - Visual Studio 2008, SQL Server 2008 and Windows Server 2008.

I chose to demonstrate PHP running on IIS7 using FastCGI, then integrating this with an ASP.NET application before finally load balancing the whole application between two servers in a high availability, automatic failover cluster.

I managed to do all that with 2 minutes to spare, so I think it's pretty clear that Windows Server 2008 is the best web stack in the world.