@Jesster: Try
www.avatarviewer.com,
www.watchavatar.cc,
www.theavatarportal.com or
www.zone-anime.com, they had plenty of ddl links when I last checked, both .avi and .rm.
Btw does anyone know when nick's going to air ep 14 of book 3? They stopped again after the 13th ep, right? *sigh*, and since I'm nearly as impatient as Zuko... *grrrrr*