No, we don't know what we're using the gold for yet. But we do know that it will be used, and we have some ideas.
Want to have some gold for when the day comes that we actually start using it? Here's a way to get 100 gold.
Refer people to the site. Easy as that. They join up, 100 gold.
(no cheating, I can see your ip address).
[edit: fefe, that's +100 for you)