I have been reading these posts for some time and I have to leap into the fray. Let me offer these reflections:
Brown V Williamson was decided primarily on the basis of division of powers within the three branches of government. That is, the court ruled that the FDA could not unilaterally assert control over tobacco given that the FDA was a part of the executive branch of government unless and until the legislative branch of government, Congress, gave it the power to do so. Thats why the recent legislation is so important; but, as most of you know that legislation expressly forbids the FDA from banning tobacco. Congress would not allow any ban given how important tobacco is with respect to interstate commerce and US tax revenues. And this bill would have been DOA without the support of Phillip Morris.
A number of posters have mentioned AEROS. This is a tobacco product. The inventor and manufacturer of the product went directly to the TTB (then the ATF) about 8 years ago and got that classification. AEROS also has a federal tobacco permit and pays federal tobacco excise taxes and cigarette taxes in states where it is defined as a cigarette. Note that the states differ in how they define cigarettes in some AEROS is a cigarette, but not in all. AEROS has always had small tobacco fibers in the nicotine infused paper that it uses in what it claims is its patented process. The FDA was stymied in any attempt to regulate or assert authority over this product because the tobacco definition with respect to AEROS came first, before the FDA knew it existed.
Nicotine water added tobacco fiber to its formulation when the FDA began circling in a last minute attempt to get the product defined as a tobacco product. Had they taken the product to TTB first and gotten it defined as a tobacco product they may not have had any issues with the FDA.
Current formulations of nicotine water (Nicolite) are homeopathic and exempt from the FDA approval process by virtue of the FDCA of 1938. Any formulation in the Homeopathic Pharmacopeia of the US (HPUS) is, in effect, grandfathered. The FDA monitors safety and adverse reactions to homeopathic formulations, but cannot stop the marketing of such a product until adverse reactions are reported in some number. ZICAM is a recent and very high profile example of this. However, homeopathic formulations include extreme dilutions and it is questionable whether or not a homeopathic formulation of E-cigarette cartridges would be effective for anyone for any reason. Also, its important to remember that vaporization has a longstanding tradition as a homeopathic delivery method- so its possible that homeopathic formulations in E-cigarettes would be OK- not effective, but exempt from an FDA New Drug Application and clinical trials.. Recent stories about Nicolite suggest that the FDA has approved the product. They have not- its not subject to their approval!
Various E-cigarette manufacturers sought and secured opinions from TTB that theirs were not tobacco products and not subject to tobacco taxes starting in 2007. Had they gotten a different opinion by putting some tobacco fiber in the product they would have had to pay taxes, but the FDA would not have been able to assert authority- until now, after the recent legislation. And, under that legislation, as a tobacco product, they would likely have been grandfathered from any outright ban of the products.
The arguments in the current case are fascinating and both the FDA and SE and Njoy have not done themselves any favors, given certain and specific assertions that each has made in their briefings.
Finally, despite the fact that many E-cigarette importers worked hard early on not to be considered tobacco products, there is some chance that they could make that argument here. The problem is that then the products become subject to tobacco taxes and E-cigarette marketers would be subject to tobacco permitting and licensing requirements both on a Federal level and in most states. The cost for those permits is huge- most requiring years to secure and the posting of significant financial bonds. So, even if they make their case they are creating another potential headache and obstacle.