Windows Azure
Windows Azure – the fastest way to create your high-scaled cloud service. The big number of datacenters in different parts of the world and vast infrastructure automatically provide advantages that inaccessible for on premise scenarios on your own servers. Azure is an open platform, it works with different technologies of development and support both Windows and Linux.
Drupal is one of embedded technologies in Azure. The developer may bring its own virtual machine or create web-sites directly on Azure, don’t wasting time for OS administration.