Let me start off by saying I respect your decision to parent your child. I just wanted to share my experiences. I am a potential adoptive parent who is in the "waiting" phase. My FIRST preference is a biracial child. I know many other adoptive couples who have adopted/ hope to adopt children of any race. There are many couples out there who would truly, truly love any child and would be deeply offended by the thought that these children would be seen as "consolation prizes" (I know you're just expressing what you've seen, I don't think you were being offensive) Anyways, I guess what I'm trying to say is that there are families out there if you know where to find them. I also thought I'd explain a little about what an adoptive parent goes through as they are preparing for adoption. Some people in the world express (through literature, the web, etc. etc.) that for a caucasian couple to adopt an african american or multiracial child is an offront to the child's heritage. They feel that cascasian people don't have the ability to raise a well-adjusted african-american child in today's world. Many potential adoptive parents buy into this lie and feel they are "playing by the rules " by asking for a child of their race. Sometimes, yes, it is just plain ignorance and racism, other times it is fear. Fear of not being able to provide the rich cultural background that a child needs to love and embrace their roots. I too agree that it is horrible to have a "sliding scale" based on race and want to assure you that not all agencies run that way.
Best of luck to you, my husband is in med school and I know just how crazy and difficult it can be! (thank goodness you're past the morning sickness, right?)