Vagrant Supports Hyper-V "Out-of-the-box"
Our code providing Hyper-V support to Vagrant has been included in the latest Vagrant 1.5 release, and so users need not install Hyper-V support separately.
Mitchell Hashimoto, creator of Vagrant and Founder of HashiCorp, said “This is an example of why Vagrant is open source. Our users asked for Hyper-V support and MS Open Tech stepped up to provide it. Including Hyper-V support in the Vagrant 1.5 release was a no-brainer once MS Open Tech had released their code as open source.”
Full details on the MS Open Tech blog.