This is what Ron Moore told Sci Fi Wire about the show's renewal prospects at the upfronts in March:
When must the decision be reached?
"I think ultimately it comes down to when the actors' contracts come due," Moore replied. "That's the real trigger, and I don't think those are due until August. However, I think that the other factor is [the network's] schedule and when they'd want the show to be on the air. So they would probably pull the trigger before that in order to start production in time to get the show on the air for their schedule."
And this is what Craig Engler (senior vice president of Syfy Digital and Syfy's resident PR guy on Twitter) tweeted earlier today:
The second half of season 1 won't air until the fall so, from the looks of it, we won't be getting any news at all about season 2 -- which, yeah, likely won't happen at all if the math is anything to go by -- until then. Except maybe an empty PR tidbit like this one here and there.