Wow. I honestly believed we had gotten past the '60's. Silly me. Still not ok to mix races, eh? Jeez, and here I was thinking we had fought that fight and moved on. Doh!
As far as your question...are you sitting down? Please, please read this whole thing. I'm on your side here. #1, your child will probably be a "consolation prize" regardless if the parents wanted a white child or not. Most people who are adopting aren't doing it for the child - what they REALLY wanted was a child of their own. Not someone else's child. Most people adopt for selfish reasons, and don't consider that there is another family involved. You wouldn't believe how many people come here to ask questions like, "we've been ttc for 8 years, and we're finally moving on to adoption" (translation: we've given up, and I guess we'll have to deal with our child coming from someone else). Most people who adopt infants are of this mindset. Granted, some of them do want biracial babies...but most of them would rather have had their OWN biracial babies. They're just "dealing with" the fact that they "have" to get "their" baby from some other woman.
#2, God is not in the business of separating mothers from their children for the gain of childless couples. Nature (or God or whatever term you prefer) dictates that by the time a child is born, that child knows YOU better than any other person on Earth. Your child knows YOUR voice, YOUR heartbeat, YOUR smell. When your child is born, s/he will expect YOUR arms. And children are smart enough to know that there is a different voice, smell, heartbeat, set of arms, than the ones they were expecting. Nature designed it this way. God would not dictate that this bond be created, only to have it ripped apart. It makes no sense. You are the only person who is equipped to meet the needs your child has. Oh sure, someone else can feed, diaper, and love your child. But only you have that bond created by genetics and nine months of sharing a body. No adoptive mother can replace you. I promise.
#3, children are not gifts to be given away (or sold, which is what adoption agencies do...think about it, it doesn't cost thousands of dollars to file some paperwork). Your baby ONLY wants you. Your baby is not equipped to meet the needs of a couple who desperately wants a child of their own.
I sincerely hope that you and your partner will consider how your child will feel about being gifted to another family to be raised with strangers, and opt to keep him/her instead. Your child doesn't care about money or nice things...s/he only cares about YOU.
If you do decide to give your child up to another family, I wish you the best of luck in finding a family who is interested in more than their own personal desperation for a child. Take care of you.