This is what you can do, go to a Barnes and Noble service desk and ask them to check stock in nearby stores or just call around your area stores. Some stores have the pre 30th in stock, not all. Maybe some can even transfer one from another store, if it's too far from your town.
Totally... I'm not so much concerned as I am 'annoyed' by like, say I wanted a stronghold games version.
I've been pretty good about checking the barnes and nobles around here for the latest edition (not even the 30th, just the latest stronghold version)...and I haven't seen them. I'm in the greater Denver area, and we don't let that stuff sit.