Xande, Amon, Unei and Doga are all from Final Fantasy III but the NPCs/bosses may have been given those names to fit the theme of the Crystal Tower raids.
And then there's Wiyu, which was the name of a weapon in final fantasy tactics.
The Odin trial hand/feet pieces are equippable by DoM.
Also, while they don't have a heavy armor appearance, the Allagan replica tunics of casting/healing are decent non-robe tops (expensive though)
There are probably different denominations of coin so you're not stuck carrying around hundreds of 1 gil coins (unless you're one of those sadists that likes to pay for everything in pennies)
Allagan currency is a good example of this and I'd like to think there's an present-day Eorzean equivalent.
There's the loophle needed to carry on with house scalping. Create and level a FC, buy a plot, claim you're charging for time/gil invested into the company.
It's inactive, I believe. Unless someone else started it up again? I'm no longer part of it and haven't heard from/seen the other two leads for some time.