If you shop at AvidVaper for your attys and whatnot, ask Cisco for some extra business cards. He has the "what is an eCig" demo on the back of his cards.
With that said, I need to remember to ask for more next visit.
I still feel awkward in public, no matter which tool I'm vaping. But, I have quite an assortment of pv's ... from stealth to outrageous. When I see smokers, I can't wait to watch their expressions when the fog lifts. When I'm around non-smokers I like my stealth types...
To make a long story longer... I guess it depends on the crowd. Be prepared and take both the outrageous and the stealth wherever you go.