I think another idea would be good...
How about mass-messaging, by that i just mean, like when sending emails you have the cc field, so why not have the same added to the in-game messaging system? It would allow you to say, send update messages to all of your group members without having to re-type it several times, or when you just want to send multiple notifications out.
I can't really think of any bad points for this update, except adding to sir emi's ever-growing list of 'things-to-do' so i thought id stick it in the works!