Ecig advocates take a harm reduction approach, rather than the quit or die approach of anti-nicotine zealots. All evidence suggests that ecigs are vastly safer than burning tobacco.

Here is a recent survey of all available research. We could further extend this by looking at known cancer/cardiovascular risks of the small bits of concern with ecigs then compare to burning tobacco and you are talking about 1% danger comparatively: http://publichealth.drexel.edu/SiteData/docs/ms08/f903492642...

There is some movement for hte industry to regulate itself and suggest sensible rules, but if ecigs are "deemed" under the 2009 Tobacco act, it will potentially wipe out all innovation because of the rule that any new product be "substantially equivalent" to a product on the market before some arbitrary date in 2007 they set. There's all sorts of horrible rules being proposed which go beyond just making sure the liquid isn't contaminated.