What an interesting thread. Lots of different issues here: gay parenting, surrogacy, late parenthood, celebrity parenthood...
Everything's been said, except perhaps two points.
First, just a little niggle: that little line about 'babies being treated as the latest accessory'. This nearly always gets applied to gay people, doesn't it? Do heterosexual people think our motivations for wanting to bear and raise children are any different to theirs?
The other point, and mainly in response to swananduck: back when my grandmother was having her brood of mixed race children, she was constantly criticised for deliberately creating children who 'won't belong anywhere'. Actually, I remember this being said quite often in my childhood - the idea that is was cruel and irresponsible to create children who weren't black or white, and therefore would face a life of prejudice. I live in London, and I don't hear it now...
Nobody wants their children to face bullying and prejudice, and gay parents think about this A Lot. For many of us, it is our biggest fear and one of the reasons why we postpone parenthood. And I do accept your point that sometimes social barriers and prejudices have a function, and should be heeded. But we need to be very careful indeed that we have got the balance right when we suggest that whole social groups of people should not become parents because other people have an attitude about it.