I am using Trello to manage a project that I am doing with some of my students and I am finding that there are times when it would be useful to send a message to all of the users of the board about some change that was made to the board (i.e., meta-Trello).

Is it possible to send a message to board members that is not associated with a specific card? (I know I can use @user within card comments)

If it is not, what is the best way to deal with meta-Trello issues?

(I can always just email everyone but I would like to keep it in Trello if possible.)