Any Avatar: The Last Airbender fans on my flist?

I have just become aware of its potential awesome. Mishmash animals like koalaotters and TURTLEDUCKS? OMG AWW. And the voices of Jason Isaacs and Clancy Brown and Mark Hamill and Dante Basco and even a bit of George Takei? How could this NOT be something I would love?

Now I'm regretting not paying attention if I did see references of this. Nearly three seasons already, that's a lot of catch-up. Is it worth it, any fans of it out there?

ETA: Hee, apparently I did an Avatar meme a bit ago.