We have babies!!!
I looked in this morning, and there was a pile of fur in the corner of the kennel that mama rabbit is in. I'm glad she had them there, because she's been using the "box" I put in for her bathroom, and now I can just take that box and dump it to keep things fresh. I don't know exactly how many babies, but I saw one pink one moving around in the fur, and 2 black and another pink moving outside of the nest, so I just reached in long enough to put those three in the nest. Then I kicked my daughter of out her room, put a space heater in there, and shut the door. (It's super cold in the room, and I don't want to lose babies just because it's mama's first time.)
So right now we have at least 4 moving, healthy babies. I didn't dig in the nest to count more, and the nest is FAR back in the kennel. I just left her alone.