Introduction to Azure Biztalk Service
Update: As of today Nov. 22, 2014, Azure BizTalk services are generally available and completely supported and backed by SLA. Recently Azure added a new service that is in the preview. BizTalk services is a new part of the Azure family. You can apply for the preview version and it will be available right from the Azure console. It took few seconds for my case to get approved so it should be fast for you as well....