The only issue left for the FDA to justify the legislation of e-cigs, is the nicotine level in e-cigs.
The availability of hardware is untouchable, but high nic levels may fall under a more obscure NRT provision, if juices are demonstrated to deliver more nic than gum/patch/lozenges, those may become restricted (though not eliminated). Low nic level juices should remain available. Higher nic levels may become available by prescription only (but let's face it, that's a recipe for a black market).
Could you stay on e-cigs at 18 mg/mL? Or 12?
Join CASAA.
CASAA also works at getting good research information, and educating public officials about the safety of e-cigs, for those cities/counties that are considering a ban of the use and/or sale of e-cigs.