Yes, the heat is on in the house!
Plumber Man worked very late last night (he was there until long after I was asleep) and got the boiler going, the pumps to circulate the water through the floor heating pipes going, and this morning when I opened the house door to check on things ... it was WARM!
Plumber Man is working again today, putting in the insulation under the floors (to make the heat go up where it is needed) and soon we will have water. Water! Heat! It's almost like a real house! :D