I'm sure we are all aware of this site but just in case (and at the request of their community manager, who was really nice in their message) I'm going to make this post here.
Yellow Gremlin is quite the useful database, and most of the recipes I've used from it have been spot on. The game is new so some of the info is bound to be off for a little while but they've been making great progress with updating it.
I was informed as well that they'll never have ads on their site so, to that end I approve. They make no money, and simply enjoy playing the game and sharing the info with the rest of us.
The site for FFXIV can be found at
http://ffxiv.yg.comI've also added their search window to the bottom of the widgets on the right.
Additionally they now have this bazaar system thats pretty neat, you can post up what your selling on yourself and your retainer and people can search it and then go find you. Its located here
http://ffxiv.yg.com/bazaar?fl&srv=5