I would like to start by recommending Auronlu's Auron/Lulu Shrine. It's a great jumping off point for Aulu fans with many great fanworks to be had.
And yes, there already is another auronxlulu community, but it is owned by a deleted journal. Hopefully this one will manage to be a bit more active! To start things off, we encourage you to introduce yourself though this little survey:
1. Favorite Final Fantasy X character?
2. Favorite scene from the game?
3. Favorite aeon?
4. Favorite song/area theme?
5. Do you create any fanfic or other fanarts? If so, feel free share your link.
All is optional, of course and you can add anything you'd like.