The house finches have been gone for at least a week. My dad and I finally took down the nest-in-a-webster from the rafters of the garage for a look - and there were five eggs in it, quite cold. One egg you can't see in the photo was in a separate little pocket, must have slipped through or been left over from the first batch.
Too bad! But it is fun to see them. Now I'm not sure what to do! I know in theory you can get the stuff out of the egg and all, but I'm not sure I want to be bothered. Maybe I'll put them out for the animals to eat.