Because I'm a bit of a deer-aboo...
ERMERGERD THER ERDLERSH FERRERST

There are no quests and no chat; you just frolic and goof around and cast spells on other players to change their appearance (you can't edit your own character; other players have to cast the right spells on you). It's a lot more fun than it sounds.
For all of your chat and roleplay needs, there's a nice forum as well.
I don't play it as much as I used to (and now not at all, since the fan on my laptop broke), but it's a beautiful concept and relaxing as heck.