A few minutes ago Microsoft opened the download for the Microsoft Azure Stack Technical Preview! Taking the cloud to your datacenter and start using Azure Stack!
-> https://azure.microsoft.com/en-us/overview/azure-stack/try/
The documentation for the Azure Stack Technical Preview is also online now.
-> https://azure.microsoft.com/en-us/documentation/articles/azure-stack-overview/
Last but not least check out the Microsoft Azure Stack Whitepaper!