If that were so easy don't you think the tobacco companies would already be offering such a product?
Are you 100% certain that they're not? Who says that the tobacco companies are not funding development and advertisement of e-cigs? It might be the conspiracy theorist in me, but methinks that the tobacco industries are a lot better at adapting and thriving through increased taxes, limits on advertising, etc. than most other industries. Disclaimer: I do smoke regularly and have tried e-cigs. While the nicotine rush is similar to a regular cigarette, it seems to cause a sore throat over the course of a few weeks of use (at least in my experience)
Air pollution is really making us pay through the nose.