I am a homosexual male and agree, to some extent, with same-sex parenting. I personally think that there should be nothing against same-sex couples raising children. Damn it, there are thousands of children desperate for a home and if two men or two women can give them a stable home environment why should they not be allowed to do so? In my opinion it is beneficial to everyone.
The only problem I'd be worried about is the impact on the way children were treated at school. I wouldn't want my child to get teased for "having two dads". Therefore if I were to adopt I would be "Uncle Garion" rather than Dad, I think.