As interesting as this brief infograph and analysis at LinkedIn's blog on the migratory employment trends of former employees of Lehman Brothers, Bear Sterns, and Merrill Lynch is, I'm even more curious about LinkedIn's usage of its members information (even if it is "open" to the public). It doesn't seem too far of a stretch for LinkedIn, Facebook, or other social networks to do similar data pulls on behalf of advertisers or marketers, especially as companies try to get a grasp or develop a "best practice" on "viral" and social media marketing.