First of all thank you for your work, it's very useful and looks nice. Hope you will have enough time to develop it further. As for my interest, I would say you much thanks if you info me about exact production's years of each generation of GNs. From my side I may help with some scans and images which are not presented there at presence (f/ex 2nd generation in brown or Hotel and Casino in red).
As for other vintage Vegas decks, you are absolutely right that they have less differences than GNs. At the same time, I'm sure for some of us it will be interesting and useful to have general database and forum in one place. Might be, it's my personal interest as vintage Vegas decks collector, but I hope not only mine.
P.S. For example, I couldn't find any info about exact years of printing of the purple (Arrco style) Carson Nugget's cards and other info about them. It seems to be between 1959 and 1965, but I'm not sure.