Great opening:<p>In the introduction to Start-Up Nation, Dan Senor and Saul Singer's best-selling paean to Israeli innovation, Agassi was the soft-spoken software wiz who had a brilliant idea and a terrible time locating a backer. That doesn't seem to be a problem anymore. "Not when you've digitized the most expensive molecule on the planet," he says. "We've digitized oil." He pauses. "I'll put it this way: We have people from China here".