The rest make sure to keep them strictly separated, or else the world would end. In fluffy rainbows.
There's a set of canon comics from nick magazine http://s264.photobucket.com/albums/ii175/Eternal_Light55/Bumi%20Vs%20Toph%20Comic/ about Bumi and Toph challenging each other to an earthbending rumble in the Order of the White Lotus camp. Zuko and Katara basically send them to bed without dinner.
Re: Further Continuation: The Gaang in Ba Sing Se
There's a set of canon comics from nick magazine http://s264.photobucket.com/albums/ii175/Eternal_Light55/Bumi%20Vs%20Toph%20Comic/ about Bumi and Toph challenging each other to an earthbending rumble in the Order of the White Lotus camp. Zuko and Katara basically send them to bed without dinner.