There is only one (preview) release of VHS so far. You can also check for VHS-AM, a project that complements VHS by extending VS.NET to support Haskell integration with the Microsoft Assignment Manager academic tool.

VHS 0.1, 23 Nov 2004 (please check the Release Notes for this version) - IMPORTANT: this is an alpha (preview) version of VHS, which may cause a VS.NET session to become unstable if you create Haskell projects and / or open Haskell files! Check the release notes for information about known bugs.

Plase note: development of a Visual Studio plugin for Haskell has been proceeding on two fronts.  Simon Marlow and Krasimir Angelov have been working on adding complete editor support and a project framework integrated with Cabal, whereas the current release is based on a fork of the codebase several months ago, and has a different feature set. We hope to combine these versions and make further releases in the future.