Yes, went to Denver recently with several devices in my "man purse".
One was an old Copper mod I used to make. Kind of pipe bomb looking device.
Out of Baltimore "what's that?", "an electronic cigarette", "oh....ok". No problems at all and they never mentioned anything else, the eGo, cartos, or juice.
Back out of Denver was a little different, it took me 10 minutes to convince them it (the Mod) was only an Ecig.
Lesson learned, no crazy looking devices, and don't hide anything.
Oh, I did use the eGo on the plane, in a stealth manner.