LinkedIn, the social network for the working world that now has some 450 million members and is in the process of being acquired by Microsoft for $26.2 billion, today took the wraps off its newest efforts to expand its site beyond job hunting and recruitment, LinkedIn’s two big business mainstays. The company has launched a new site called LinkedIn Learning, an ambitious e-learning portal tailored to individuals, but also catering to businesses looking to keep training their employees, and beyond that even educational institutions exploring e-learning courses.