I think that I'm gonna try and replicate that. I don't have the patience to rebuild them and sometimes we burn through these heating coils ridiculously fast. I was thinking of taking apart some different plug-ing scent things. I hear the airwick freshmatic uses that same technology (the ultrasonic thing). I figure if I take it apart and mess with it a bit (thin down my liquid with water, take note of the power being sent to the unit, etc). I don't care if I'm vaping cool or not, I can replicate throat hit with other things if I feel the need. But also, what about taking apart some of the plug it in plug it in things...they heat up, maybe they are using a different technology to heat it up? I know sometimes on ebay you can find a bunch of the piezoelectric ultrasonic thingamijiggies (there are not on there ATM, but I have seen bags of them before). The only thing that would have to be figured out is how much voltage it would need, how the liquid might need to be thinned different, and how to manufacture a tube with a mouthpiece on it. I'm not savvy enough to figure it out from scratch though.
On another note, I believe that the original ecigs did use this to feed the heating coil, but they DID still use a heating coil. The liquid would hit the ultrasonic disk, the disk would vaporize the liquid and send it up through a heating coil, the heating coil obviously just heated the vapor up a bit.