Earlier quoted context omitted.
We will of course do this for the second kid :-). I think this will turn out to be not too much of a burden. I am sending a dozen medium-sized emails everyday already, what is a couple more for my children.
I say that as an eldest son with two siblings who still give me crap years later because my parents invested more time in "parenting stuff" with me than they did with either of them.
The upside is that the younger sibling gets the invaluable experience of a sibling from day one.
But regardless of what happens or doesn't happen between child 1 and child 2 in the case of the original poster, this is a great idea.