No, in Massachusetts "second-parent adoption" has been legal for several years. What this means is that one person adopts/gives birth to a child and then the second parent can also adopt even if they're of the same sex. An acquaintance of mine did it. Good point about the distinction between that and adopting as a couple. I know next to nothing about the adoption process... one hopes that God will take care of that in its time so I won't have to go that route. :)
I can't imagine that the SJC ruling would mean anything but equal treatment of couples regardless of sex. That said, individual case workers still have a lot of leeway in determining who would provide the best home for a child. Proving discrimination is next to impossible. There are way too many parents and couples chasing too few healthy babies. For older kids, on the other hand, a lot of normal couples are going to take a pass...
I assume you meant not "no" but "yes".
That is how all non-married couples adopt. As two singles.
I can't imagine any way their Supreme Court can justify descrimination against one type of married couple based solely on the sex of the members.
Even though their court has no need to make any legal sense, and it obviously couldn't sensibly be done legally, the political and ideological considerations they put above the law would stop them.