There was an article in the weekend Australia (issue before the current one) about a lady who set up an organisation to facilitate inter-country adoption. She was very criticial of government regulation. In the most recent issue, there was a response claiming that the demand for inter-country adoption far exceeds the 'supply' and that deregulation only leads to a bidding war, unethical treatment of poor mothers to con them into giving up children, or outright kidnapping.

The original article:

http://www.theaustralian.news.com.au/story/0,25197,24616141-5012694,00.html

Actually, in terms of population issues, China is probably the best country to adopt from. They have the best control over their population, so you won't be adding to it. Their standard of living is also rising rapidly, so even that half of the equation is diminished.