Super Mario World... of Warcraft is teh best. It covers everything from the Mario games. http://bit.ly/gN8cC2

I really like super mario world of warcraft too.
I actually was working on changing it up a bit to play legend of zelda sounds (water temple is gona be great with the ocean themed raids hehe) but I got derailed by real life qq!

http://bit.ly/fI8dSI

There's no way for an addon to cause sound on another player's game, unless of course they have the same addon and it's designed to behave that way.

If it was possible for addons to make sounds for other players, there would be a hell of a lot of abuse.
http://bit.ly/f5IvYm