OK, I've had immediate success: isopropyl alcohol.
Using cotton balls, lightly damp with isopropyl alcohol, I've been able to remove the goo without damaging the artwork or finish of the CDs. I've also been able to remove any goo from the Folder Pages as well.
After wiping down everything, I've wiped clean with cotton balls soaked in water. The first few are up in the kitchen drying now.
So far, I've had great success. I've also pushed paper CD envelopes in to sleeves of the Folder Pages and intend to put the CDs back in the Folder.
edit: I've noticed that some of the color from the artwork comes off with the alcohol. I highly recommend that you use the alcohol sparingly and wipe very lightly.