> I don't really understand the point of OSX Server beyond possibly render farms (for music / movies)
Small businesses, because they are very easy to manage.
More importantly though, Mac imaging. You can't run DeployStudio on anything but a Mac running OS X Server. So if you have more than 5-10 Macs to manage, having an OS X server around is a no brainer. It doesn't cost much and it makes managing & imaging Macs as simple or simpler than PCs. This is by far its most legitimate use.
Small businesses, because they are very easy to manage.
More importantly though, Mac imaging. You can't run DeployStudio on anything but a Mac running OS X Server. So if you have more than 5-10 Macs to manage, having an OS X server around is a no brainer. It doesn't cost much and it makes managing & imaging Macs as simple or simpler than PCs. This is by far its most legitimate use.