I’ve just heard that Microsoft Hyper-V Server – the free version of Hyper-V with no reliance on Windows has shipped. Hyper-V Server will be available for download later today from the Microsoft website.
For more information about Hyper-V Server, check out the blog post I wrote a few days ago on host virtualisation using Microsoft Virtualization technologies.
System Center Virtual Machine Manager 2008 has not been released yet but Microsoft do say that it will be ready by the end of October (they had previously indicated that it would ship within 30 days of the Microsoft Virtualization launch last month).