We put the second coat on the bathroom today and it looks great. 1 coat of primer, 2 coats of paint, and done.
The kitchen and breakfast room are another story: after putting a second coat of paint, I can still see the primer color and the yellow right through it--it's almost like we're painting with Kool-aid.
We took a break to drop D. off at his mom's, came back and put a third coat on the breakfast room, and it still didn't cover completely! I'm just about ready to head over to Home Depot and strangle the people in the paint department, but I suspect that I'll do much better if I get a good night's sleep and head over there tomorrow morning.