Rob Farley at Lawyers, Guns and Money is a daddy times two.
Speaking as one half of an unmatched pair, I don't know whether the appropriate reaction is "congratulations" or "you poor bastard." My parents would have more precise input, but I think time (and the fact that they no longer have to feed, clothe and house me) has clouded their memories.
Man, it seems like a lot of people I know are having kids lately. And just yesterday, my dad's all like "being a grandparent is so much fun... no pressure."