I have to send DH shopping on his own for the rest of the stuff from our registry and all the little things we need. I've thought of a few like breast pads, nursing bras, baby shampoo/wash, etc. Name all the little stuff you use for baby that you wouldn't necessarily register for. I'm a little afraid to send him without a concrete list...who knows what he'll come home with.
Re: all the little things....
Gerber cloth diapers for burp cloths
NB footed sleepers (if it's a boy you need extras since they urinate for every diaper change and you can only catch so many with washcloths over the penis) and extra washcloths if you don't have enough to stock the changing station with.
no-scratch mittens for when you can't get to the nails quickly enough.
lanolin, vaseline for a boy's circ, alchohol swabs for cord care and nipple shields (get these from the hospital and you don't need to buy them)
maxi pads - again stock up at the hospital but you'll need your own too, even if you have a c-section like I did.
white noise machine
do you have tons of receiving blankets? You can swaddle with them or put them over the changing pad, again for those diaper change urinations
extra sheets for basinette, crib or PNP for sleep-time spit ups
does the nursery have a clock? Very important for those middle of the night nursing sessions. Something I didn't think about until I needed one!
You will need more burp cloths and wash cloths than you think you will need. We went out to buy different sized blankets because we couldn't swaddle A in the small recieving blankets. See if you can take the ones from the hospital. We couldn't but friends of ours were able to.
I also recommend food for you that's easy to grab and eat with minimal preparation. I loved bagels and Pop-Tarts, and it was nice to be able to reheat a bowl of soup when I wanted in the micro.