If your new to the game here are some great websites full of information to help guide you on your ffxi adventure:
http://www.finalfantasyxi.com/ promotional site. can get trial here
http://wiki.ffxiclopedia.org/wiki/Main_Page pretty much anything you need to know can be found here; quest/mission walk throughs, item/armor guide etc.
http://campsitarus.blogspot.com/ The Low-down on all the best experience party camps
http://ffxi.allakhazam.com/ another great database, and a good forum community
http://www.bluegartrls.com/forum/ a very popular and active ffxi community aimed more towards the advanced players.
http://ffvault.ign.com/ another database and community
http://www.ffxi-atlas.com/ all the ffxi maps in one place. Nice resource if your lost somewhere
http://www.ffxiah.com/ an online Auction database. Browse the current prices of armor weapons food etc. here