Is scopalomine the only glutamate-enhancing treatment you've tried? Also are you dosing high enough to ever have hallucinations from it? I know that in high doses it is a deliriant (frank, often scary hallucinations in lieu of LSD-like technicolor laser beams) just like Benadryl. Does not sound like fun, especially for a severely depressed person. If all you've got is dry mouth, scopalomine sounds like a good deal.
I would be interested to hear about how doctors are administering ketamine to patients (are they IVing 80+ mg all at once to send people to the K-hole or just giving people a slow drip?). The DEA has ketamine in Schedule III and I don't hear about it being used much outside of veterinary hospitals, so I'm curious how they settled on a dosage plan.
I would be interested to know if these doctors can work up a ketamine treatment that offers long-term improvement, whether it's through something like indefinite semi-weekly treatments or a one-time treatment combined with psychiatric counseling to start a new chapter in the patient's life, so to speak. Users of dissociative anesthetics have known about the ketamine/pcp/dextromethorphan "afterglow" for a while now, but they've also known that it fades after a day or two and that paranoid ideation and emotional instability often settle in soon after.
Also, scopalomine occurs naturally in some plants. Have you looked into finding a cheaper source than some pharmaceutical patch? And finally, you should really submit this story to Slashdot. I mean, you're talking about a depression treatment that's not just some stupid SSRI, but something that actually works, right away? This is much more interesting and important than crab-based computing.