The Players Guide posted in the downloads area is an outdated version. Until it's posted on the site, the newest version can be downloaded here:
http://www.utdallas.edu/~grantr/files/oofaq.zip. It's still fairly old (been a year and a half since .16, the most recent) but the one on this site is positively ancient.
There's lots of new stuff in the new one, so check it out. My favorite addition is probably the stuff about item cloning.. very dangerous, but by far the quickest way for high-level players to earn crystals.
Just like the download description says, this document lays bare pretty much every secret in the game. If you want the satisfaction of finding all this out yourself, don't look (but be prepared to get pounded by everyone else).
Tarix, if you could post this new one on the website, that would be great.