I remember reading on the forums a few days ago that someone heard there would be things people can buy with crysta that would be used to raise money that would be used to help the people in need in Japan. I don't know if these rumors are true, as I haven't really heard anything about them, but I got to thinking this might be a good idea. I think now would be the perfect time for them to come up with a buyable in game item to sell us. Whether the proceeds be donated or not.
I think that a minor, non game breaking item would be a welcome bonus to those enjoying the game, and also give SE an idea of how many people are considering long term play in FFXIV. To keep it fair but also worth buying, they could make it an item that would be added into the game a year or two down the line.
As an example, I'd love to see an SP bonus accessory. Something like a 25-50% bonus for 30 minutes every 24 hours. It would be useable for crafting SP unlike GA, and it would be able to stack with GA.
I think it would be nice to have the option of buying a helpful item like that as a limited time offer. Something to reward the people who have stuck around so far, and who think they'll be sticking around a while longer.