Could be done, but you'd have an easier time of it getting the documentation from sony - and we all know that's not likely to happen.
Reading the drives themselves aren't hard- OS X handles that already. It's talking to the changer to tell it when to switch discs, to what number, so on.
Personally, I think that would be great, if the drive was any good, use it for mass sequential ripping of 200 discs at a go.