Windows Home Server "Vail", the next major version of this product, will be based on the current generation Windows Server platform (Windows Server 2008 R2) and will share a number of features and capabilities with Small Business Server and Essential Business Server. Unfortunately, Microsoft has been tight-lipped about Vail and the quality of information we have today is lacking, to say the least. Fortunately, a recently leaked build of Vail – tagged build 7360 – has shed some light on what the WHS team has been working on.
Link – http://www.withinwindows.com/2010/02/02/a-look-at-windows-home-server-vail-build-7360/