Well Madonna I have a Skip Hop, but much prefer my Ju Ju BeAll (plus it's very purdy!) so you could always get another one, you really can't have enough changing bags!
Top frivalous (or essential as I've told me H 
) things you can get for a baby:
Morrck hoodie (Their blankets are also gorgeous!)
A lovely vibrating rocking chair
Slings (and let's face it you could go mad just with this one, get a stretchy wrap, a structured carrier, one to be used only on Sundays, you get the picture 
)