I have the same cabinets Chevyman! I have pics posted on my profile, but can't figure out how to post them on a thread....anyway, what I did to add more shelves is took a glass shelf sample to a glass shop to cut more pieces, went to a Micheals & bought some cake tiers, 7" are good height to add more shelves.
Thanks to Tom for the idea several years ago!! OK Jimbo, I got to see that as I want to add shelves!! Jimbo first if you have not done so, open a free photobucket account as it is very easy to post pics on these boards with that. We can help you post pics then for sure!!! Dave.
just checked my profile pics, and the ones I uploaded don't do my cabinets justice, I'll have new pics uploaded the end of next week when I'm back home from work....the cake tiers work great too! I also tried the 5", they're a bit low, but still work just the same!