Cottonwood
Roadster#433, Model S#S37
View attachment 57165
This map shows the currently planned Supercharger Stations through 2015. This suggests that there won't be one for Tallahassee within the 2015 planning horizon. However, the distance between the planned DeFuniak Springs Station and the now operational Lake City Station is excessively long at over 220 miles. As you say Tallahassee would be the logical place to place a Supercharger Station to split the distance.
It sure looks like a red dot on that map between the Chattahoochee River and Tallahassee, just west of Tallahassee. Of course, these maps have proven to be less than perfect, but more "broad intent."
I completely agree; for reasonable Supercharger spacing, something is needed between between Lake City and DeFuniak Springs. On flat ground, spacing somewhere between 90 and 133 miles is perfect. Tallahassee would fit that criterion well.