The problem with the wine is that it messes with both your meds and your liver. Most of your diabetes meds say "Do not take alcohol while on this medication" and I believe them. Many of our meds are broken down in the liver and adding the additional strain of the processing of alcohol along with it can cause liver damage.
For myself, I feel that it's just plain not worth it. I don't want to stop at one glass ('cause I miss the buzz!) and I found myself having it almost every night instead of just once in a while. I did find one thing that helps me a bit. I started using wine in my cooking to get that tangy flavor with meats and light sauces. The alcohol cooks away and the essence of the flavor is still there.
If you're on good terms with your pharmacist I would ask him/her about mixing 6 oz. of wine with your meds. They have the list right there and they are the most knowlegable about side effects and contraindications. They will give you the straight dope, too. They are also invaluable when it comes to starting a new med. I've had many experiences with my pharmacist letting me know that the new 'wonder drug' that my doc had started me on might not be safe or mix well with my present meds. Pharmacists really know their stuff.
Hope this helps.
"People are like stained glass windows: they sparkle and shine when the sun's out, but when the darkness sets in, their true beauty is revealed only if there is light within."
- Elizabeth Kubler-Ross