A small business server appliance for non-IT based small businesses. I'm thinking: Network attached storage with a built in Samba NT compatible domain controller/windows file/print sharing capabilities. RAID-1 plus an automated backup mechanism ... maybe, attach an external USB drive and it automatically does Sunday fulls and daily differentials keeping as many as it can store. Bonus points if it can take extra SATA hard drives / external drives for expansion without adding a huge cost.

Why I'd buy it? My dad's company is running a (very nice in its day) server on Windows NT with "redundant everything" that is starting to fail something fierce. It's 13 years old but it meets the needs of him and his ten employees and at the time there wasn't much of a better choice. Since they don't do anything locally but file/print sharing it seems like such a waste to have a power hungry box with a monitor on it for such a simple set of requirements. Also, if something like this were available, I'd replace my existing home-brew NAS ... based on openSuSE with it in a second if it'd lower my electricity bill.