Of course the presumption in this title, with which I disagree, is that unmanaged learning is simply a matter of chance. But that can't be right; otherwise, informal learning wouldn't be very important even now. Have a look at this - and especially read the comments in George Siemens's piece. And note well that corporate learning is (almost) always about control, which creates an internal tension in any corporate informal learning. To see this point, look at this article (via James Farmer). "MySpace isn't that much easier to use than Friendster, or than other shared-user-content sites like Flickr (photo sharing), del.icio.us (bookmarks), or Digg (tech news). But it mixes multiple publishing models--blogs, photos, music, videos, friend networks--into one personal space. Most important, it doesn't presume to know what your goals are."