The choice of where to hold NPE2012 should not be thought of as Chicago vs. Florida, but as “Where is the center of the lower 48 states and their nearby cities?”
The center is near Lebanon in Smith County, Kan., and the nearest cities are Lincoln and Omaha, Neb.; and Topeka and Kansas City, Kan.
There may be enough convention facilities in one of those four cities. Also, I suspect they will be cheaper than Florida or Chicago.