This morning we went to the post office and mailed our formal application. It only has to go to Chicago so the post office said they should have it on Monday. We also applied for our passports. They said it will take anywhere from 1 to 6 weeks to get them back, that's a lot faster than I thought. We even remembered to get the extra passport photos needed for our dossier, so that will make things a little easier down the road!