Well, I think its the radiator itself (either the side facing the engine or the bottom) if anyone happens to stumble on this posting. The missus was kind enough to come out with a jug of coolant, stop leak, and a new radiator cap. It leaked, and leaked, and pressurized and leaked worse, then slowed and the temp came down but continues to have a drip. That and now there's a drip coming out of the exhaust pipe at the tail (strange addition here).

She's taking the baby home with el father-in-law and I hope she makes it. We shall see...

In the mean time, anyone have any stories of massive radiator failure without warning?