With all due respect, the excuse: "There are so many other pinkies out there who are much higher with no products being sold" is played out, for me. Each company (scam or not) is its own animal, and there are different kinds of scams.
I DO NOT believe SDVI is a scam in any way, but I can imagine there are different methods for scamming stockholders with this company as a tool. Heck, the fact that it DOES have a visible product would make it a better scam, if that were the case.