Yea, defilers are great, they are good against pretty much anything. And not just plague. If you put a dark swarm over your hydras carriers can't hit them! I actually value swarm a bit more than plague, especially vs protoss since they got those shields.
Meh, Joe killed me with carriers once (24), he hid them somewhere and they come out and all I had was ultras and ling... I'm like "DAMN I NEED DEFILERS".
Carriers, yesssss... I love covering them in slime of all colors and shooting them down, and showing my opponent he spent so much time and money on such useless ships.
Yea, 2v2 is funny... medics with zeals and stuff like that, funny unit combos... tanks under swarm with lurkers in front... lol.