ZDNet.com reports that Nicholas Negroponte, founder of the MIT Media Lab has stepped down in his role of chairman of the lab in order to pursue his $100 laptop initiative. The non-profit initiative, named “One Laptop per Child” is looking to develop low-cost laptops for the world’s poor and has gained the endorsement of the United Nations. In addition, Lab director Walter Bender has also taken a two-year leave of absence to serve as president for software and content development for the project. Entrepreneur Frank Moss has been named the lab’s new director. These changes are effective February 1st…