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One could go the other direction.
By simply heating the fuel rail just before the injectors. If you look at the vapor diagram of C8H18 (octane) you can see that octane boils at approximately 130 degrees F. This is easy to achieve in an automobile engine as coolant is more than this at operating temperatures. In modern pressurized coolant systems that can run above the boiling temperature of water, you have the opportunity to heat your gasoline (octane makes up the bulk of gasoline). Modern fuel systems pressurize the fuel rail to 45 pounds per square inch (Psi) so you don't have much worry about vapor lock.
Also, if you are injecting into the intake at valve opening you will have a pressure drop across the injector causing more differential between the boiling point and the working point causing near instantaneous vaporization of the fuel droplets as they enter the cylinder.
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