Svengali is wrong. Some people do that, but mostly only people with more Gil than sense.

RAIST pretty much has it spot on, though I'd recommend http://ffxi.gamerescape.com/wiki over ffxiclopedia, as the ffxiclopedia founders left it to start Gamer Escape and most editors wen with them.

Also, Grounds of Valor, recently added, works much like Fields of Valor, but in dungeons and with increasing bonus XP and better buffs.