In my search for resources to help me find some good Aion info I've ran into a few nice websites. And so I thought I'd post the useful links that have helped me get up to speed on Aion and see what others can come up with.
Aion™ Online: The Official Aion Fantasy MMORPG Website
The official site everyone knows about. Not as helpful as it strictly could be.
AionArmory - Aion Database
Appears to be the most useful and best known Aion site. Features an extensive list of items, equipment, and a forum.
Aion Maps v 1.00 Live
This website pinpoints the locations of all gathering/aether extraction points by type/level and more.
[Translation] Artifacts - HellBound - Aion Gaming Guild and Community
One Legions forum thread explaining Artifacts and their unique abilities.
Aion Fly - Aion news, guides and opinions
Features many articles and guides covering aspects of Aion
Flying Bishounen
A player's blog that has a lot of good info particularly for Templar.
Impetusium - Thulf's Aion Blog
A player's blog with some well written info and reasonable maps.
Post some good links of your own if you've got 'em.