Identity and insights meet at the junction of LinkedIn and SlideShare as the professional social network just purchased the presentation sharing site for $119 million – 45% cash and the rest in stocks. “Presentations are one of the main ways in which professionals capture and share their experiences and knowledge, which in turn helps shape their professional identity,” said LinkedIn CEO Jeff Weiner. “These presentations also enable professionals to discover new connections and gain the insights they need to become more productive and successful in their careers, aligning perfectly with…