Microsoft just made a splash in the cloud backup space with the announcement of their Window Azure Backup Service Preview this month. While I’m sure other traditional software and appliance vendors will be partnering with Microsoft to offer a more application coverage, I haven’t heard any announcements so we’ll just have to wait and see. For the time being thought, it’s an exciting time for customers using one of the three products eligible for the preview. Below I’ve summarized how customers of each of the three products can become eligible for the preview.