I've added a bit more to my card, and now have $110 on after buying the photopass stuff.
The birth certificate applications have been handed in so should get the kids certificates in about a week. I can get their pictures done sometime next week, get them signed, then get the passports sent off!
I'll have to go through the whole thing again with my birth certificate and picture, and will probably do that in a few weeks.
After we have our passports, I'll have to apply through ESTA, which shouldn't be a problem. This approval will then last two years.