TL;DR--We just did it, don't be a poon--go to the free orientation even if you aren't "100%" committed, Foster care is how we did it.
We just finalized the adoption of our two girls last month. They have been living with us from the foster care system for just over two years. I don't know anything about private adoption, except that all adoptions are facilitated by private agencies in our state after parental rights are terminated. We never looked into the private route or international because using the state foster system is essentially free.
First off--I could not disagree more with all those saying that you have to be 100% committed to adopting to begin the process. This is faulty logic, I was practically in shock at the birth of our first two kids, and there are plenty of days where I wish I had less responsibility. You already know that feeling, or you are good at deluding yourself. Any part of the adoption or foster process is going to have a series of 'no commitment' orientations that will expose you to the realities of the experience and the extreme need in every community. Our facilitators seemed hell-bent on talking people OUT of fostering based on the stories they told. There is absolutely no reason, other than being a total poon, not to agree to attending some type of orientation if you are considering this. On the other hand, being open and honest with your wife about your doubts IS CRITICAL. Go and learn everything you can for free, and talk about every one of the classes with her afterward--SHE might end up talking YOU out of it.
Our story: We have two bio sons who are 'tweens'. Both were pregnancies were totally without issue. At about the time that we would have thought about a third, we moved across the country and restarted our careers. When things were smoothed out again, it just seemed too late to go natural again. At the same time, we both felt called to help--put our money where our mouth is, so to speak, regarding the problems in our, and everyone's, community.
Our first point was that our bio sons should be safe, so we stipulated on our foster license that the children would be infant thru at least 4 years younger than our younger son. My wife and I both work, so we stipulated no 'medically fragile' children. We did not stipulate gender or race--but you can and should be specific if you have those wishes. Why? A couple of examples--you would be expected to be an expert in the care of hair for a black child, and you would be expected to celebrate the culture of any race of child (think holidays, food, etc), and you would be expected to follow tribal customs if you fostered a native American child. You should also specify the ABSOLUTE MAXIMUM NUMBER of children you would accept into your home. We allowed up to two, because we didn't want to be responsible for splitting up siblings. After hearing about the extreme need and shortage of foster homes in our state, we were surprised to wait for 60 days or so our first placement of two children. Talking with clients of mine, who happen to be family law attorneys, it was shared that as soon as we stated we were willing to take two, we were getting two. The powers that be were not going to let that opportunity pass.
This is already too long, but I'll throw out a couple more things--working with the state is pain. I called it a 3 year long proctology exam--your pants are pulled down for everyone to see during that period. Your family is interviewed, including your children, your references are checked, and your home will have modifications made--guaranteed. My favorite is the water heater being turned to just above lukewarm. Finally, as mentioned above there may be some placements that go back to their bio families. In the eyes of the state, this is a success. As a foster parent you have to commit to the state's goal of reunification. Once parental rights are terminated, you get the joy of waiting for a frivolous appeal. It may be a low cost way of adopting, but it is not fast.
Post up an email or other contact info if you'd like to talk more--my email if my name, so not gonna post it here.
Edit to add funny story re: race--I have dark features, hair, eyes, tan easily, while my wife has blonde hair and blue eyes. The girls are similarly divided. On multiple occasions in public places, strangers have commented that one girls looks just like me, while one looks just like my wife. Funny how things work out sometimes...
One more edit: My google-fu is weak, but I see that there were 31000+ foster children in TX in 2008. This website posts more current info:
http://www.pathway.org/programs/foster-care/statistics/You will not wait long to be placed with exactly the type of child you specify.
Ridin' 'cross the desert. . .