Nanotech Insulating Paint?

This stuff is very intriguing. They're claiming up to 20% savings though no firm evidence of this.

SFGate - There is, however, a great deal of information about Nansulate's performance based on real-life tests in industrial and residential settings. Factory owners have reported savings of 20 percent or more on their energy costs. Home energy savings of 20 to 40 percent are reported in testimonials on the Industrial Nanotech Web site. Although the foil-and-bubble-wrap insulation conserves some heat, it typically allows too much heat transfer to explain so large of a differential. My educated guess is that the Nansulate is responsible for 60 to 80 percent of the differential.

Here's the Nansulate site.