Its interesting of course witht hose addons that works as a shared calendar for the guild, its something I was thinking about, however when you play hc you will always have players online and will have a hardtime getting everyone to signup. However Ive noticed that it's easy to get people to tell when they are afk.
The group calendar is a step in the right direction, however I would love to see features like that you can just clikc on a specific day and choose afk. Then the officers wont have to put up events etc for it. If you also could import that calendar into a database and be able to put it on a website it would be perfecct for what I was looking for
Think I might just have to learn coding myself and develop it...