I don't think anyone is actually saying e-cigs are a good thing, just that (compared to 'analog smokes) they are a better thing. I've been using e-cigs myself for about a year, and I concur with most of the previous anecdotes; I smell better (in both ways), I feel better, and I'm saving money.
Anyone who blindly says "e-cigs are healthy, great and fun!" is an idiot. E-Cigs and analog cigs are like American politics; neither is actually good, one is just less bad.