Here's their thinking:
2010 will usher in a new decade at a time when the world is likely still to be facing tough economic challenges. Some are predicting the worst of times. But we think it's a time to regroup, re-evaluate and then to dream. Dream big. Because the world of ideas has never mattered more. Behind the headlines, innovation and invention are alive and flourishing. And it's here that the long-term future will be rebuilt. We think there's never been a more important time for the TED community to gather and learn from each other.Go check it out - ted.com
So each session of TED2010 will tackle one big attribute that the world really needs. Insight. Leadership. Courage. Imagination. Simplicity. Laughter. And so on. And it will do so based on TED's unique mult-disciplinary approach. You'll find more details of the program here.