So now it was just a waiting game, right?

Not quite.  After a morning of watching the contractions level off and actually subside a bit -- better than on the magnesium sulfate! -- the perinatologist returned at noon.  The blood labs had come back.  Some bad news: Ginger's kidneys and liver were sub-par and continued pregnancy was getting downright dangerous for her.  Oh, and a chest X-ray showed that she had a significant amount of fluid in her lungs.  The doctor's orders were now to deliver these babies today by hook or by crook.  He ordered the nifedipine to be stopped.  Great -- we're letting natural labor progress, right?  Wrong.  The doctor ordered Pitocin to induce labor.  Drat -- this was the development that Ginger and I dreaded most.