Microsoft Windows Home Server 2011 - 64 Bit, OEM $30 +shipping AR

Currently Out Of Stock!
4:00 Eastern, listed as In Stock

http://en.wikipedia.org/wiki/Windows_home_server

Windows Home Server is intended to be a solution for homes with multiple connected PCs to offer file sharing, automated backups, print server, and remote access.[3][4]

Features

Centralized backup - Allows backup of up to 10 PCs,[9] using Single-instance storage technology to avoid multiple copies of the same file, even if that file exists on multiple PCs.[10]
Health monitoring - Can centrally track the health of all PCs on the network, including antivirus and firewall status.[10]
File sharing - Creates and operates network shares for computers to store the files remotely, acting as a network-attached storage device. Separate categories are provided for common file types like Documents, Music, Pictures and Videos.[10] The files are indexed for fast searching.[11]
Printer sharing - Allows a print server to handle print jobs for all users.[10]
Shadow Copy - Uses Volume Shadow Copy Service to take point in time snapshots that allow older versions of files to be recovered.[12]
Headless operation - No monitor or keyboard is required to manage the device.[10] Remote administration is performed by using the Windows Home Server Console client software provided in the bundle. Remote Desktop Services[13] connections to the server are supported while connected to the same LAN.[14]
Remote access gateway - Allows remote access to any connected PC on the network, including the server itself, over the Internet.[14]
Media streaming - Can stream media to an Xbox 360 or other devices supporting Windows Media Connect.[10]
Selective data redundancy - Guards against a single drive failure by duplicating selected data across multiple drives.[10][dated info]
Expandable storage - Provides a unified single and easily expandable storage space, removing the need for drive letters.[10][dated info]
Extensibility through add-ins - Add-ins allow third-party developers to extend the features and functionality of the server. Add-Ins can be developed using the Windows Home Server SDK, to provide additional services to the client computers or work with the data already on the server. Add-ins can also be ASP.NET applications, hosted in IIS 6 running on WHS.[11]
Server backup - Backs up files which are stored within shared folders on the server to an external hard drive.