Yes, the numbers are staggering. Adopting two children out of this environment is not even a blip in the percentages. It will take all of us to make lifesaving drugs available to the parents of these children, and for the children themselves. If ever a phrase like "if we can put a man on the moon, certainly we can (blank)" is appropriate, it is now.
There are many agencies at work making ARVs available for adults and children with HIV/AIDS. We sponsor a child through this one.
Also, be sure to read There is no me without you. I'm making it your assignment for the next couple of weeks. Ok, not really, but kind of, yeah really. As soon as I get mine back from my MIL, I'm happy to loan it out.