I played through this game over Thanksgiving break right after it came out, but I don't remember much outside some of the major cutscenes. It was to be one part huge, sprawling adveture, and an equal part full of Final Fantasy series fanservice, in-jokes, and references. I would probably re-play it if they remastered it for HD.

I worked at a videogame store then called FuncoLand (now consumed whole by GameStop), where we actively advised against getting the strategy guide because it was utterly useless. The Final Fantasy IX Official Strategy Guide, as noted by Kotaku, told you to go to the (shortly-thereafter defunct) PlayOnline website for just about everything. 13 years later, a completely unknown side quest has been discovered (found by a NeoGAF poster), as seen in the video below. Go to the YouTube page for more info in the About description:

This is a side quest on disc 4 that was unknown to most FFIX players until yesterday when a topic popped up on the FFIX message board at GameFAQs. It was discovered by The_Kusabi_ (through the Ultimania guide) and confirmed by MysterPixel. Naturally, I had to check it out and I decided to record a video.