Probably quite a few people under 18 but I'm guessing.  Going back to how to promote bitcoin, I know they are kinda on the fringe, but how about things like Coast to Coast AM and Alex Jones. I mean, like I say they are kinda on the fringe, but they have a fairly large listening audience, and I get the feeling a lot of them are the type that tend to do things like hoard gold now.  I listen to coast to coast, I don't hoard gold but I don't have the money for that, plus I expect the govt will simply make trading gold illegal when the dollar crash comes.  FDR did it before after all.  I also think Judge Napolitano and Glenn Beck weren't stupid ideas, although I sincerely doubt glenn beck would understand the technical aspects of bitcoin, he would understand that it's about getting away from the Fed and the market manipulation that goes along with it.  A lot of people on the far right are very worried about the state of the FRN right now (justifiably IMHO), and we might be able to get acceptance through this. 
On a completely different note, but also in line with getting more people to use bitcoin, there are a lot of business models that are completely legal, but extremely difficult to find a CC processor for.  Things like online tobacco sales, online ammunition sales, private firearms sales (would only be legal in US if you held an FFL or only did business in your state), and even "adult content".  Also, bitcoin could have a role as an in game payment currency for mobile and social network games.  I realize that long term micropayments aren't a very good thing for the network, but what some of the mobile apps are referring to as micropayments aren't micro at all.  Also, maybe an android app store run using bitcoin, the overlap between developers that opt to use a linux based mobile platform and libertarian minded hackers might be all that would be needed to gain acceptance.