No, there is a list of avatars you have to use.
fantage! it has avatars and chat.
HAbbo and There have avatars and horseland and howrse. you can chat by writing stuff in the box iddin has avatars
No there are no avatars for message boards yet
go to jellyneo.net and they have cheats for getting avatars.
What do you mean seven avatars? there were thousands before aang. in the episode The Southern Air Temple you see the room with all the avatars
the season of charmed with avatars is season 7 or 8
Gaia Online has some pretty good manga avatars
You don't.You can get free avatars at photobucket.com,avatarist.com,Etc
her name is Yangchen and we dont get told the avatars before Yangchen
A flood. This is for the blue avatars from Pandora.