>Questions - do privates get filtered? Will there be an option to block threads someone is a participant in?

Ed,

Right now the only thing the filter affects is the new messages view. This is because the desire was to allow the filtering wihtout eliminating the possiblitiy of the user finding the messages if they wished to. So in searchs and any other thing but the New messages view the twit filters don't do anything. I also believe that they don't block private messages.