A notebook or calender to record baby details.
Blank cards or note paper for thank you cards
some lovely natural (petrochemical free) wash, cream and/or balm
paw paw lip balm
a lovely warm beanie for the baby
New baby blanket - even if you have some of these it is lovely to have a new one for the new baby
mobile
socks - we needed new ones as the elastic was shot on the hand-me-downs
music cd for baby to relax to
story books for older siblings (to keep them occupied)
face washers or terry nappy flats to use as burp cloths
fess little nose drops (inevitable that the new baby will get a cold with older siblings around!)
a big bottle/box of a lovely natural scent free clothes wash liquid/powder
weleda products - including nursing tea if your friend is going to breast feed

(love the idea of chocolate, amber teething necklace and photo frame/album too)