The transistor, invented 60 years ago, is the basic building block of the digital age. Now, consider a world in which there are a billion transistors per human, each one costing one ten-millionth of a cent. We'll have that by 2010. There will likely be 4 billion mobile phone subscribers by the end of this year...and 30 billion Radio Frequency Identification tags produced globally within two years. Sensors are being embedded across entire ecosystems - suppy chains, healthcare networks, cities...even natural systems like rivers.