Not to blow my own horn, but The Disney Shorts Message Board.
I ran into it this morning, and couldn’t find it again, because
I made the same mistake you did–her name is not spelled Cas… but Ces…
There is a large teen message board:
http://www.teenfx.com
It deals with a bunch of problems and stuff.
Go if you are interested.
If you’re a horror (books, movies, games, music) fan, try http://www.horror.net/cgi-bin/Ultimate.cgi?action=intro&BypassCookie=true – the folks who go there are all over the place, artistically and intellectually – there’s truly something for everyone.
http://www.simonsays.com has a link to a Stephen King board (and other Simon-Schuster writers). It’s mostly amateur fiction, but you can usually find some interesting discussion whenever King does something new.
found this thread in my logs and thougt i’d check it out. i feel so special to be remembered. 
Oh, and there’s some message board like thing called “Usenet” I think…maybe it’s an AOL deal?
