They never made it very clear what happened to Azula. She gets chained up and made all moist, then freaks the fuck out. I'm a little sad she didn't enjoy bondage more than that, but I guess it's to be expected. But after that, nothing.
I was a little disappointed that Toph's crush on Sokka seemed to vanish into thin air and all she wanted was to bend metal and be portrayed by burly men in plays.