To not regulate nano is like letting cancer cells run amok. The power of all technologies are so immenselly powerful that it would be foolish to not regulate them.
In nature all organisms are regulated - your immune system regulates the cells of your body. Anarchists - cancer cells are quickly killed or they take over.
The internet is a system that came to be without regulation, and look at the problems that are evolving with security.
Does anyone really think that regulating the inevitable miniaturization of technology will really slow anything down? China, Japan, Europe, Singapore, etc are all working on Miniaturizing. Even if we regulate will that make any diference for China? Perhaps not, but I think the rule should be the following that we can champion.
You should be able to stop or dissasemble anything you build.
That means no persistant nano molecules, and no grey goo either.
Technology is like a runaway freight train, accelerating downhill. Nobody can stop it but a driver would be nice, and a brakeman.