I'm saddened about some of the attitudes on the thread, although glad to see they are in the minority.
We have two amazing gay friends who are in a long-term and committed relationship. They are educated, intelligent, funny, loving, generous, financially-stable, charitable, sociable people. They both want a child but one of them is holding back, not because he thinks they would not be good parents, not because he thinks there are moral issues, but ONLY because he thinks that too many people still think "well, it's just not right, is it."
He thinks that the child would be subjected to negative attitudes. He is clearly right.
If they decided to go through with it and use a surrogate and if our family was complete and I was still of an age to be suitable, I would do it for them in a heartbeat. I didn't enjoy pregnancy at all, but I reckon I could cope with 9 months of "exploitation" to let these two great men be parents for the rest of their lives.