When I was growing up in the dot com craze of the late 90s at Columbia Business School, all the traditionally conservative MBA candidates who normally wanted to go into banking or consulting dreamed of striking it rich by starting their own tech company or going to work for a new one like CMGI, TheGlobe.com, Yahoo, or Excite.Today, it seems like young tech talent wants to go work for Apple, Facebook, Google or Amazon. Where are the hot new young companies of today's generation?