Actually I heard (from a reporter that had a telephone conference with "the most senior" administration officials) that they found the compound a couple of years ago (i.e. during the latter days of the Bush Administration), but they were not able to confirm that Bin Laden was physically there until recently.
Most of the intelligence that went into this operation happened under Bush and the principal lead came from none other than KSM, who, during his waterboarding interrogations at GITMO, gave up the names of Bin Laden's most trusted couriers. They then began tracking these couriers which led them to this compound.
Good post.
Thanks for the info.