While everyone else was saying that Operationearly bird would lead to a trailer or Prologue video. I said that it was probably going to be a secret IMAX locations to screen The Dark Knight Rises. Well it turns out I was right, http://www.operationearlybird.com/map.html now displays a map where you can find locations near you to see a screening of the Prologue.
Operation EarlyBird Leads To Early Screening Of Prologue
Dark Knight Rises To Feature 50 Minutes of IMAX Footage!