The California Supreme Court has just issued a ruling saying that the supporters of Proposition 8 who stepped in to defend the lawsuit against it did have standing to do so.
So what does this mean ?
Well assuming the 9th Circuit Court Of Appeals agrees with the ruling then the case would continue to proceed through the federal courts for a determination of the validity of the law itself. This would mean a review by the 9th circuit court over the coming months and then a probable review at the US Supreme court during the 2012-2013 session, with a final ruling sometime in 2013.
Of course the federal court could also decide that while the supporters had standing to step in to defend the suit in state court they did not have standing to do so in federal court (a US Supreme Court ruling seems to suggest lack of standing in such cases).
Either way it means a long road before the case is finally resolved.