From what I've read, it was a joint SEAL, Ranger, Delta, Green Beret, and Air Force Special Tactics team called task force 145 that called in the airstrike.
As to the reports that he wasn't dead, It figures that the media (ever sensitve to Arab sensibilities) tries to portray him as a "martyr" (however you spell it) valliantly defying "the great Satan". My guess is that the Arab media in particular is going to try to make Zarqawi a hero out of this.
Though, this is a step forward. Kill enough of their leaders and sooner or later they're going to run out of volunteers.
I think that this will be a big setback for the al Queda in Iraq, but you have to remember that there are multiple groups operating in the area.