well, i suggest to have it off, and put on above it, flashplayer! with short clips. press the on button to play, and that. because its more importan ito attrac members by its own content, ratherplaying a big sounded clip, that a user will not know how to close. (if hes new, ofcours) ok.
RSQViper
Maybe instead of defaulted to OFF, you can have it defaulted to MUTE?
Not sure if that is possible or not, but it's an idea.