OK, that answers most of it.
I was thinking USB because I firgured it might have been easier to send the small signals over USB than trying to adapt the CD/DVD to work over com ports.
What I was thinking of.
1.) Flash Drive or small hard drive. Linux.
Software to copy/burn dvd
(You start 1st one, put original in reader drive)
(Put blank in burn drive , Or when system starts up,
have it open read tray for disk. Once disk is in it opens
burn tray and sends signal ready for disk.)
Open tray when finished, send signal that tray is open to Arduino.
2.) Arduino gets signal door is open and gets disk, and sets it down, then gets new disk, puts in tray, sends signal disk is in tray.
3.) Software gets signal, closes door, and burns another copy.
4.) Over and Over until no more disks available.
5.) Tells software job complete and it shuts down until the next start up.
Is this too much? Should I be thining more small computer system to talk to the Arduino?
This just something I hoped to do since I have a lot of free time until 2011.