Baby Meds and thermometer. Be sure you have what you need to reduce a fever (trust me on this one for sure) plus diaper rash cream and any special needs meds.

Atleast one bottle but two is better.

Formula and pre-boiled/sterilized water (even if your wife breast feeds). You never know when you and the baby could be separated from your wife or you wife may be unable to feed due to injury or some other circmstance. You want to know that you can feed the baby on your own if needed.

Pacifiers... atleast one if not two.

One or two complete changes of clothes.

A blanket.

A couple small toys. May seem silly but if there is a special type of toy like a teddy bear that will soothe a red-faced teary-eyed screaming baby then you'll want it with you more than anything else when the need arises.

Last but certainly not least, as many diapers and wipes as you can possibly carry. Figure out how many you can carry and then find a way to stuff a few extras in there as well. <img src="/images/graemlins/smile.gif" alt="" />

One more idea (that not everyone will agree with)... when my son was younger (we are just now starting to potty train him @ 23 months so I dont carry them anymore) I carried a couple reusable cloth diapers in addition to a ton of disposables. I'm glad I never had to use them but I'm also glad I had them just incase since all you need is soap and water (or boiling water) and they can be sanitized for many reuses if needed. Not to mention that they are handy for a lot of things other than their intended purpose since they are very soft and absorbent.

A little baby sunscreen proabably isnt a bad idea either.

BTW: Congratulations.....!!!! <img src="/images/graemlins/grin.gif" alt="" />