Congrats to your friends! Over the moon doesn't begin to describe the joy they are feeling ... We just finalized our adoption of our foster son in mid-October. We've had him since he was 4 weeks old ... He's just over 22 months. Pure joy! A couple of recommendations based on some of the things we received ...
We didn't get any of these, but they are recommended in Adoptive Families magazine and the profit goes to help support other foster families
http://www.abeadofroses.com/e-commerce-solutions-catalog3...
We received this book from our social workers ... Cry every time I read it ...
http://www.amazon.com/Wished-You-Adoption-Recipient-Creat...
We received a lovely silver frame with our son's name engraved and his adoption date. Looks beautiful with a picture of him in it from that day.
We received this from our CASA worker. I love it.
http://www.amazon.com/dp/B001BDQQ76
A gift certificate to a local photographer or studio is also a great idea. Check out Craigslist for any deals ... That's how I found the one we used. She was great.
There's also an organization called Red Thread Sessions (http://www.redthreadsessions.com/) that takes pictures of adoptive families for free. We didn't go that way, since they post the pics on-line and own the rights; your friend may be interested though.
Again, best wishes and congratulations to your friend. You're awesome for being so supportive and welcoming to their new little girl.