I HAVE SEEN plenty of uses for this. I did IT at a small news paper and when I first started, we had 3 or 4 Ruby iMacs acting in server roles. They were finally replaced with MacMini's. However, these did not require OSX Server for their purpose, but for tasks such as moving wire streams, file conversions, getting files to and from the image adjustment servers, etc. they really were perfect for the task. For instance, we setup an old dual G5 for a file server role for dropping articles with OSX Server...if and when that system dies, the need for a rack-mount server or MacPro is over-kill for 80 or so users, MacMini however...perfect. There are many light duty server roles like this that a Mini running OSX Server would be useful and cost effective.