Whilst Microsoft Windows Home Server is an solution for home users with multiple computers and related projects and as related to some of you in this audience, smaller businesses operating from home.
Microsoft's Small Business Server has been a very popular tool serving the small business market (75 computer users or less). It has just about everything you need to manage and protect your businesses network. It's part of the Windows Essential Server Solutions Product Line
Windows Home Server helps you backup and protect files, access them remotely and share them with others and is targeted specifically at the small office home office user.