DH and I are not having a shower BEFORE we have our child, and by the time we come home with baby and get through the relinquishment/revocation period we will have already acquired a lot of gender neutral 'newborn essentials'.
We still plan to have a 'welcome baby home / birth-day party' but on the registry we would put clothing and essentials for later months of life.
The problem I found was that there was no one (or even two or three) stores that had everything we liked.
www.myregistry.com I found is an excellent way for adoptive parents (well any parents really) to register (thus featured in adoptive families magazine). You can create a registry link for friends/family but you can put stuff on your registry from LOTS of places. AND you can also create a cash fund (give it a name, like Baby Fund or what ever) and friends/family can contribute to your cash fund. The cash is then sent to your paypal account.