Can a web site persuade you to be politically active? Can a mobile phone motivate you to exercise? Does instant feedback on gasoline use change how people drive? Do online rating systems inspire people to behave better online? These are the questions asked and answered at Stanford's PERSUASIVE 07 conference, coming in the second quarter of 2007. If you've got something to say and feel like doing it in writing, the call for papers has been extended to Jan 15th.PERSUASIVE 07 will focus on how digital technology can motivate and influence people. This event will bring together researchers, designers, and developers interested in computers designed to change human attitudes and behaviors in positive ways. Key themes of PERSUASIVE 07 include health, education, sustainability, productivity, social relationships, trust, ethics and more. Technologies of interest include web sites, mobile phones, video games, and electronic devices, among others. The conference is broad in its appeal as contributions and papers are sought both from academia and from "practitioners", aka you grubby and persuasive capitalists out there. We've previously covered related news out of Stanford's Persuasive Technology Lab. Our article entitled "People Found to be Overwhelmingly Superficial", summarizes key findings around how website visitors make value and credibility assessments of public sites. These are all highly interesting topics for those of us designing and operating the public Internet and have relevance for many disciplines. The Persuasive Technology Lab is run by Stanford psychologist and entrepreneur, BJ Fogg. He is the author of Persuasive Technology: Using Computers to Change What We Think and Do. Contribute to the discussion if you can -- both short (4 page) and long (12 page) papers are being accepted up to Jan 15th, 2007. And if you'd rather play passive consumer, track the developments (and eventually sign-up) here. The event kicks-off in Palo Alto, California on April 27-28, 2007.