Yes, nanosprings, so-named because of their appearance rather than their mechanical properties, were first explored several years ago, but now are available in commercial quantities for application developers.
Interesting link you provided selinz!
So it looks like nano springs have been around some time now since that article dates all the way to 2003. The important news here is that they found a good application in the biomedicine world.
Also in that other link is mentioned how they have to use all sort of really special equipment like electronic microscope to handle and measure the properties of such nano-devices.
This reminds me "inner space"... remember that movie?
It's interesting but it's almost a misnomer to call it a spring, in that they have yet to really measure any mechanical properities and it's unlikely that it will be used as such.
See http://nanotechweb.org/cws/article/tech/17297 for more info.