Wow...that brings up a lot of stuff, and sheds light on the current FDA issues w/electronic cigarettes.
While I might agree that the FDA's current push to treat e-cigs as a medical delivery device is mostly a power play on their part, there certainly is precedent from that Nova episode on previous products that needed to be treated that way. And while e-cigs are different in all the important ways from those previous products (specifically, zero actual tobacco combustion), without testing to prove that they are in fact safe, the FDA is only doing its job mandating that testing be performed on these products prior to their introduction into the retail mainstream.
I really hate to admit this, but the FDA is right to be poking their nose into this; it's their job. Who's to say that we're not exposing ourselves to something highly dangerous, since no one can say empirically otherwise?
Common sense would say that we're reducing our risk by vaping, but science and common sense don't always go hand in hand. Look at the results from some of the "reduced risk" products developed by Big Tobacco: Many should have reduced their users' risks; but testing found that while it reduced some, it introduced others, or heightened existing ones.