There's many startups attempting to do this including pipl.com, http://cazoodle.com/ http://cazoodle.com/ among others. Here's some research about it: http://w

There's many startups attempting to do this including pipl.com, http://cazoodle.com/ http://cazoodle.com/ among others. Here's some research about it: http://www-sal.cs.uiuc.edu/~kcchang/ http://www-sal.cs.uiuc.edu/~kcchang/