All the kids are teenaged or older. They were originally looking for a puppy (less than 1 year) but after we talked I think they agreed that an older dog might be better - more mature and calmed down a bit. I don't think they were looking forward to all the necessary training, housebreaking, socialization, etc. that came with a baby.
With an older dog, I think they could look at pretty much any breed or mixed breed rescue that has their dogs in foster homes and find a dog that has the right personality and energy level for them. That's what I suggested to them actually, and I hope they take that to heart - we have lots of reputable rescues in the MD/DC/VA area.