I found a quite good document yesterday that profiles nearly all of the smokeless alternatives. It was produced in 2008 and includes pages on Ruyan's e-cig and those from
njoy and Crown7, so it's as recent as we can expect. Everything we discuss here is in there -- including Stonewall, Camel and Marlboro snus, Swedish snus, and much more. This takes hours to read, but you'll find lots of "how much nicotine" data and lots of "why the FDA said no" information. Great material.
I copied it and moved it my web server. It's a PDF.
What I was searching for is the answer to "how much nicotine did Accord, Premier, Eclipse and Heatbar" deliver. Those used a cylinder of
tobacco moistened with propylene glycol and then heated from the tip to produce vapor to inhale. RJR spent almost $500-million developing one failure.
The quick answer is some nicotine, but not as much as burning a cigarette. Good stuff. I figure the only people who would care about this are reading this thread, so I'll link from here:
http://www.karr-tv.com/PREPs.pdf