So far we've done limited tests using VMWare ESXi and Citrix Xen and they're both working well. We now want to do some serious testing with copies of our production systems but before doing so I want to evaluate Hyper-V to see if it strikes that balance between licence cost and product maturity.
Reading through the FAQ it would appear that the Hyper-V Server is free to download and use. But will it remain free forever or is that only an 'introductory offer'?
I know we can use Xen for free and that is still an option but just wanted to check out Hyper-V before we spend any amount of money on hardware and people's time.