Here's an update:

Kerry and Dan went to the hospital this morning. Kerry had some more tests run, including blood pressure which was just fine. All the tests were perfect, in fact. Given that, as well as the extremely busy state of the labor & delivery floor this afternoon, Kerry's doctor asked if she'd be willing to get induced Tuesday night. That way, her doctor would be available to deliver Jack on Wednesday morning when she was back on duty.

So it looks like Wednesday, January 18th may be Jack's birth date... stay tuned!