The Track Team just posted this link on their Facebook page. It's a petition for A:TLA and LoK soundtracks. I assume that, because it already has the attention of the esteemed and idolized Track Team, that this petition will have more success convincing Nickelodeon. (You hear, Nickelodeon?!)

Online petition.

So sign it, my dear Avatards! Perhaps we shall finally have the sweet songs and epic scores of this magnificent soundtrack at our fingertips!