Alcohol will spike your bloodsugar just like table sugar will—only faster. That's all there is to it, really.
A lot of recovering alcoholics are big sugar addicts because they're unconsciously using it as a replacement. Sugar addiction is probably, in many cases, a
precursor to alcohol addiction.
Tom Naughton is interesting on this:
Fat Head » Primal Body, Primal Mind, Primal Tools
He's also talking about Nora Gedgaudas' book there, already mentioned in this thread. Sure, worth a look. Nora herself does neurofeedback (a kind of biofeedback for the brain) as well as nutrition. I'd guess that she'd probably advise any recovering alcoholic to try that if they possibly can. It has been used treating alcoholics with pretty impressive success. You might like to try Nora's podcast number 41, available here:
Primal Body Primal Mind Radio - Download free podcast episodes by Nora T. Gedgaudas, CNS, CNT on iTunes.