I don't know if this has been suggested already,but one thing I would love to be implemented in game similar to the Calendar in WoW.

Benefits are that you could schedule events on the calendar in-game as well as send out notifications of invites to the events.

For raid events you would have them on the calendar and when said members want to sign up you could open the calendar , click the event and then the menu would perhaps be something similar to how party finder is for when you click a certain party looking for more. By that I mean it will list the needs of the party for specific roles and if they are that class they can fill in that spot.

When all the roles are filled the event starter gets a notification and then it settles on who would be going for that event on that day,etc

Dunno how many people would find it useful,but I know definitely my FC would as we have a small/medium sized FC we tend to have scheduling issues with people for raids and other events so having something like a calendar in game would greatly help us in our effort to host raid nights with less issues.

I'm kind of curious as to how many other people would find this type of feature useful. Post your thoughts please