An early build of Microsoft's next Windows Home Server, codenamed Vai has leaked to the internet. The build is 7360, and was a community technology preview (CTP) that Microsoft shared privately with select beta testers. Out of the box, Vail provides simple file sharing, remote access, home computer backup, expandable storage through Drive Extender, and media streaming both inside and outside the home. Vail also contains an application catalog and product-wide extensibility model so that new services such as anti-virus, online sharing, and home automation can be seamlessly and easily added to the solution. The system requirements for are listed as a 2 GHz x64 processor, 1 GB of RAM, and at least one 120 GB hard drive. NTFS is the only supported file system.
Yup, it supports a lot more of the new features in Windows such as homegroups and it will also be the first 64bit version of Windows home server i believe. Theres a really nice video showing how it can stream all your media stored on the server across your home network or the internet in your web browser. I carnt find it now but they have implemented a really nice player in Silverlight.