While I got the details of how we'd get here a little wrong, it looks like I got the timing pretty much spot on, or at least better than either Harry or Mitty.
Supreme Court decision in June 2013.
More like June 2015 or 2016, and I could easily see it taking until June 2017. The Court can decide both Prop 8 and DOMA in ways favorable to same-sex marriage activists without invoking the equal protection clause and it is clear Kennedy is looking to be a moderate hero and do so. It'll take a case reaching the Supreme Court from a state in which SSM is not recognized at all to get the court to strike in all 50 states.