Seems to depend on the school. ASDOH's deadline was May 1st I think but I've heard others had a May 15th deadline. I have not heard anything from ASDOH.
If you were waitlisted at schools like NYU or USC you might have a chance. Otherwise I would get your application in order for 2007. It sucks and I know what that feels like to be on a waitlist. I was waitlisted at 5 schools the year before.