Seems to me the Obama camp might have taken advantage of the historical symbolism, if you're going launch on the fourth day of the fourth month, which happens to be the day Martin Luther King, Jr., was assassinated. Obama could have returned to the rhetoric of his 2004 keynote address to the Democratic National Convention:
Go into any inner city neighborhood, and folks will tell you that government alone can’t teach our kids to learn; they know that parents have to teach, that children can’t achieve unless we raise their expectations and turn off the television sets and eradicate the slander that says a black youth with a book is acting white. They know those things.Obama might have used this day to remind Americans of his commitment to these values. He might have spoken on the crisis of education in the black community, and the need to strengthen the family and commit ourselves to a politics of life. For more on this, see Ken Blackwell and Robert Morrison, "Crisis in the Black Community."