To those who want kids but haven't, for whatever reason, been able to come by them in the traditional manner, there is always adoption. Not just the tedious, expensive, American kind, but international adoption too.
(slightly off-topic alert)
I've been following the blog of a lady in the valley who adopted two boys from Russia just over a year ago, and it's been really eye-opening. Of course adopting from America is great too, but something about taking kids out of desperately awful conditions in other countries and giving them a shot at being in the lucky 3% of the world population fortunate enough to live in this country... it just makes adopting a kid that much more appealing. Given my choice, I'd like to have two and adopt one, probably from abroad. Unfortunately my mate of choice isn't so hip on the whole adoption thing, so I probably won't get to, but I think it's really great.
Anyway, that blog is:
http://kaufmanfamily2.spaces.live.com/
If you go back to the first posts, they go through the whole adoption process, trip to Russia, etc.