The role of glutamate in mental illness, especially schizophrenia. More drugs, with the hope that there won't be side effects. When you're monkeying with the brain, I can't imagine not having side effects.
The most interesting part of the research, for me, was this throw away sentence:
Another glutamate drug, meanwhile, has been shown in preclinical studies to reverse mental retardation in adult rats, a finding that previously appeared impossible, Dr. Insel said.Can you imagine the implications of reversing mental retardation? And, would a smart person be made smarter with a drug like this?