One Laptop Per Child techie wants to make money on cheap PCs

Mary Lou Jespen, founding CTO of the One Laptop Per Child project, recently walked off her job at Nicholas Negroponte's charity case. And now she wants to build a $75 version of the laptop that OLPC has struggled to build for $200. But Jespen may be crazy like a fox. She's actually building a business — the insanity!…