Cheapest Windows Home Server I could find, unless you build your own that is.
Asus takes aim at the top of the home server market and hits it spot on with the TS Mini SOHO series. This compact box is more than just a drive controller and some connectors. It's powered by an extremely energy efficient Intel Atom 1.66GHz processor with 1GB of DDR2 memory. Windows Home Server operating system helps you easily store, access, share and protect your digital files.
It already includes a large 1TB SATA drive for great storage, and you can add additional hard drives without tools. If that isn't enough, there are 6 external USB 2.0 ports for external storage devices, printers and wireless networking. Or, if you want to go wired, there's a Gigabit Ethernet port. Two e-SATA ports are provided for high-speed external drives. This gives you redundancy or the ability to attach networked devices.
Automatically manage files, back up multiple computers and deliver security protection. You can even set up a personal web address to be used for remote access and for visitors. Enjoy the functionality home server system with ASUS TS Mini SOHO Home Server!