Over the past few weeks Microsoft have released the code to implement Moodle and Moodle 2 on Windows Azure saving you the cost of hardware, redundancy and data protection.
Using Windows Azure to host the website and SQL Azure for the database you now have another reason to move to the cloud and keep saving on it.
You can download the instructions on how to do is from Codeplex.
Moodle 2: http://moodle2azure.codeplex.com
Note: These are in beta and should be treat as beta. Ensure you read all the documentation on how it works before making a decision on implementing it as a beta and production.