When can the marriage ban question be put on the ballot?

Seeing as how the prospects of a constitutional convention being convened are small, and that the right doesn't seem to be actively campaigning for it(As they probably realize it'd be a terrible idea: flaying the whole constitution open), when is the earliest that the marriage ban question can be put on the ballot? And is it likely it will ever be on the ballot?

As far as I can puzzle, it can't be a ballot initiative until one is approved by the state legislature and they are now in recess. Even if they decide to go this direction in the fall, there won't be enough time for it this year. I can't see that the state has the resources to hold a special election, so even if the legislature approves putting it to a statewide referendum, it wouldn't come up until the fall of 2010 as far as I can figure.

Unlikely that Dems will lose enough seats in the next election for Gronstal to be replaced (also doubtful there would be a coup within the party). Half the Senate seats are up each time and current lead is I believe 32-18 Dems. So if the Dems stay in the majority in the senate 2011 and 2012 would be out.
Then should the Reps be put back in control of the senate (and the House at the same time) after the 2012 election then a bill calling for it to be on the ballot would need to pass the legislature convening in 2013. And the same bill would need to pass the legislature again after an intervening election in 2014, so it would be in the legislature again in 2015. Should it pass in both sessions, then it would be on the ballot in November 2016. I believe that it only needs a majority to pass.
So as you can see our constitution don't change often. I believe the last time was in 1993 and it had something to do with equality for women.
And if it passed all those hurdles, I would suspect there would be some litigating. There would also be a lot of marriages that would have to be dealt with.

That is my humble analysis