An unheard competitor to Windows Azure, Amazon EC2 or whatever that is and so on, they are planning to support Windows Server 2008 R2 virtual machines in addition to reducing pricing and discounts for the cloud services. Others include Compute Engine, App Engine, Cloud Storage and BigQuery. Also, Google has announced that there will be limited preview of Windows Server 2008 R2 virtual machiens for the consumers. Other OSes such as Red Hat Enterprise Linux and SUSE Linux Enterprise Server will be available at the later time. We can probably assume that its competitors also support Linux OSes such as Ubuntu being compatible with Windows Azure, System Center, etc. for example.
Now, you have to know that such kinds of cloud services like this are for businesses and not personal use friendly so behave yourself online and know the business-friendly-only technologies when it comes to commenting about them. We don't want to see anyone taking them for general failures in the stupid way.