How can I control two ceiling fans and lights with one single pole switch?
The only product that I know of that will do what you want is the Lutron Maestro Light/Fan control.  This product consists of a switch and canopy module.  The switch will digitally talk to the canopy module over the single ungrounded wire and control lights/fan separately.  The kits are one switch and one module but the switch can talk to 4 modules at once.