One thing, though: I’m dying to hear more about your grandparents’ liquor cabinet. If it’s as big as you say and contains booze from decades ago it’s a gold mine. Even if there isn’t anything that’s no longer made–say, Creme Yvette or Forbidden Fruit–you’re still looking at stuff that’s probably different in some way from what you can buy today. Any number of whiskey’s, for example, have lowered their proof over the years. It was only a year or two ago that Jack Daniels went from 86 proof to 80 proof. If I remember correctly, it was 90 proof before that.
Anyway, I like the blog as is but I strongly urge you to see what else your grandmother is willing to part with and to post about your finds. There are cocktail geeks all over the internet who would flock here if you did that.
I assume you’re away of CocktailDB.com but, if not, there’s quite a bit of information about spirits there and lots of great photos of old bottles. Some of the folks in the eGullet and DrinkBoy cocktail forums can likely be of great help too.
http://forums.egullet.org/index.php?showforum=88
http://groups.msn.com/DrinkBoy/messageboard.msnw