Oh yeah, Zuko/Song is quite popular, actually. More popular even than Zuko/Jin, which I totally don't get, because he actually went on a date with Jin, and got a kiss, and even admitted he had a good time. :p

(Of course he had to go ruin it by being emo and confuzzled: "It's complicated." Actually the concept of sex is quite simple, Zuko. !!! He gave up this to go get it on with Mai? Gimme a break.)