Pick any relevant search stream e.g. this or that and you will quickly notice the unmarketed value of the Mac Mini. Personally I seem to regularly rely on this pup in a pinch. Case in point: I needed to move a ton of NTFS data to an NFS export.
So let's say you have a ton of data to move from NTFS to NFS (ignore the why and what for now [think MP3 and Windows sharing is bloated]). Assuming you do not have a nice NIS setup - your options are file transfer e.g. SFTP or mounted file systems.