Just a suggestion but not sure if there is a feature for the sign -ups but idea I had was since the site offers sign-ups for events, does it have the ability for a person to coordinate who he wants that has signed up and assign them to a task of the sign up?
gonna have to play around with it a bit but so far when a person signs-up for the event the person can approve, decline, or put on stand-by/awaiting
what I'm thinking is perhaps expanding the list for the original person (or persons who have permission to) have a seperate list they can create the finalized list and it gets posted before or at the time the event starts. because sometimes raid leaders need to make a change to the list if someone who signed up has a different role they can play (or in my case has a different ship class they play that we need for a event thats more important) anyways just a thought I'll play around with it see what I can do