To get started, you need access to a Windows Azure subscription. If you don’t have one already, you can sign up for Windows Azure 90-day free trial here.

Create a Virtual Machine running BizTalk Server 2010 R2 CTP

To use this feature and other new Windows Azure capabilities, login to your account and sign up to use thepreview features.
It's easy to create a virtual machine that is running BizTalk Server 2010 R2 (CTP) when you use the Image Gallery in the Windows Azure Management Portal. This post will walk you through the steps involved to create a virtual machine running BizTalk Server 2010 R2 (CTP) in the cloud.
To learn more about Windows Azure and Virtual Machines, refer to this blog post.

Management Portal Experience

You use the From Gallery feature to create a custom virtual machine in the Management Portal. When you create this virtual machine, you can define the size of the virtual machine, the connected resources, the DNS name, and the network connectivity if needed.
  1. Sign in to the Windows Azure Management Portal.
  2. On the command bar, click New.
  3. Click Virtual Machine, and then click From Gallery.