Herman Jackiewicz
Herman Jackiewicz voted up HappyTo BeHereTo's answer

The US study that found formaldehyde had to raise the ohms to 5X the power used in pens.  No formaldehyde was found at the heat used in e cigarettes.

In the UK, where there isn't a major tobacco industry, they're recommended.  Here's an article you might like.

http://www.theweek.co.uk/58735/e-cigarettes-should-be-prescribed-on-the-nhs-says-health-body

"Their findings are unequivocal," says the … Read more

Herman Jackiewicz
Herman Jackiewicz voted up Rooster Cogburn's answer

From WebMD :

So far, evidence suggests that e-cigarettes may be safer than regularcigarettes. The biggest danger from tobacco is the smoke, and e-cigarettes don't burn. Tests show the levels of dangerous chemicals they give off are a fraction of what you'd get from a real cigarette. But what's in them can vary.