This is the paradox that will probably be bad either way. If a giant like big tobacco or big pharma doesn't get on board with making/selling ecigs or ejuice, there is the risk of them being banned. Too much money flowing to the government. If they've been able to keep cigs on the shelves this long, then they obviously have the ability to dictate gov. policy. And let's not even discuss all the blatant examples of big pharma influencing politicians. At least big tobacco only has one product to kill us quicker.
However, once they get involved, the whole deal will change. All these great small vendors will eventually go by the wayside, regulations and taxes will force the costs to skyrocket. Innovation on new products will slow dramatically, and forget about buying all those great flavors you love now.
And as much as I would love everyone to make the change to ecigs, the other paradox is that, the more popular these get the more likely above scenario is to play out. Once there is a big enough market, I can assure you big tobacco will be licking their chops to get in on it unless they can just get them banned now while it is a relatively miniscule market compared to theirs.
I hope it stays just like it is now. There is a steady stream of new technologies to choose from, and so many reputable vendors to choose from. I just won't be suprised to see the whole thing come crashing down.