Aaron Skonnard has an article in the April edition of MSDN Magazine on building applications with .Net Services. .Net Services are a service implementation for the Azure cloud platform that will be the most familiar to programmers who have built WCF services, workflow services, or BizTalk services in the past. This includes features such as cloud-hosted workflows, relayed messaging, and federated authentication.

Here are a few resources you'll need to get started to try out the services that Aaron talks about.