I would not be surprised if this has already been brought up so I'll apologize now if that's the case.
I did a quick search but haven't found anything in regards to this.
This idea is just a simple expansion of the messaging service within PlayOnline and Final Fantasy XI used for messaging between you and the people on your friend list.
I think it would be good to have a live chat feature rather than have a simple messaging/emailing system. By this I mean having the ability to chat live in any of your Linkshells while your logged out of FFXIV.
It would be integrated into the Lodestone site where you have to log in with your SE account already. Perhaps this is already something that's been worked on and I have not heard about it.
Edited, Dec 20th 2010 7:51pm by weapon178