The biggest problem with nanotechnologies, someone said, is that the growth perspectives are excellent... but it lacks commercially viable products and financial results. Although, Altair Nanotechnologies seems to contradict these assumptions: begins to deliver final products and gets closer to profits. Altair can be of the firsts nanotechnology companies to reach profits and pay shareholders their expectations. I still think that nanotechnologies will be the next bubble and that energy discoveries can be the engine of this boom.
Disclaimer: I own shares of Altair.