I know the new MacBook Air provides the reinstall software on a USB thumbstick. What about the Mac mini server? Since it has no SuperDrive, I assume it will have the software come on something other than CD's?
How about just using a fire wire optical drive and hang it off the port. I see post that refer to a remote set up, but unless you are headless. It would seem to me to be another option, for raid set up and as a restore process...