If your question was about e-cigarettes that contain nicotine, they tend to be available in the U.S. and Europe as well. Some jurisdictions are beginning to.... The only ones that don't allow it are Australia and Canada. They are the two ones where e-cigarettes are available as long as they don't continue nicotine. Those are the two that I'm aware of, but in the U.S., as long as the e-cigarette manufacturer is not making a health claim, they can sell that product with nicotine.
On October 28th, 2014. See this statement in context.