Moodle hosting in the Cloud via Windows Azure
There are two projects currently available for hosting Moodle on Windows Azure, both on CodePlex (Microsoft's open source project hosting site, which hosts over 200,000 projects currently):
http://moodle2azure.codeplex.com/ This is a port of Moodle 2.x Course Management System to Azure platform.
http://moodleazure.codeplex.com/ Enable Moodle 1.9.9 to run on Windows Azure and SQL Azure
Both of these projects are on CodePlex, there's a community of support on the site for advice as you start to implement and use them there are a number of other moodle associated codeplex projects and a whole forum on the Moodle community website for Windows users