I have been a huge fan of Windows Home Server (WHS) ever since it was announced back in January 2007. This past April (2010) Microsoft released a public beta version of the next version of the Windows Home Server product, code name VAIL. The big change (behind the scenes) is that VAIL operates in a 64-bit environment, and is based on the Windows 2008 R2 platform. For a more in depth list of features with VAIL, check out this post: http://homeservershow.com/the-windows-home-server-vail-feature-list.html
There are several hardware vendors (e.g. HP, Acer) that sell headless WHS systems (HP DataVault X310/X510, Acer Aspire EasyStore H340) . I have had great success in deploying these products, not in homes, but in businesses! As to VAIL, I recently did a headless, automatic install of VAIL to an ACER Easystore H340 that I had on hand. Thanks to Kevin Royalty who helped me with the “answer file“.
Finally, be sure to check out the WHS Team Blog for up to date info on Windows Home Server VAIL.