Sue - this is such a painful and wonderful journey you are considering taking. Painful because it has been a hard road to get here, and wonderful because I think the benefits so far outweigh the crosses you have had to bear.
There are a few bloggers who have adopted which might be good to take a look at.
sharonannevanwyk.wordpress.com/ - this is a private blog, so you need to request to be able to read it. But fabulous, and Sharon is a wealth of information.
My friend is busy going through the process at the moment, and is using Procare as well.
There are a few private social workers who are very good.
Depending on what you are looking for Child Welfare in Cape Town is also a good option to consider.
I think initially people are a bit scared off by the adoption process as it requires a process, time, and a lot of paperwork - but I think once you get your head around it, it is not as big a mountain as many people think it is.
Zakira looks like a fabulous source of information.
There are so many people on this forum who can offer you guidance, support and a huge "hooray" on this subject.