Pressure Sentinel an automatic tire inflation system

[menaus2]

Just saw this sweet device thats competing in The Cleantech Open, called the Pressure Sentinel, while reading treehugger. It's a little canister that fits inside the tire that gets charged by the energy of the tire deformations as the system rotates. It has variable pressure settings by a completely mechanical system . Looks frickin awesome

[beer]

I found this intresting aswell, anybody knows if its for sale yet.
And if so where.