Congrats! I've got a two-year old boy at home, and a second due in July - believe me, being a father is by far the most enjoyable part of my day. Even when it's really not...18 with the boys should win-out over puke and diapers, but it never does.
LOL Buster - my wife has started the "nesting" stage of Baby-Brain. Rather unfortunate timeing as we're moving June 1st (at her behest, not mine). She literally spent two hours dusting, and rearranging trinkets on a single mantle yesterday.