I was thinking we could all keep an eye out for treasure chests and log the information about them, the area they are in, and what you got etc. Eventually these location could all be put on a map and when you go on leves you would have some general idea of where to keep an eye out. Somehow I doubt the appearances of chests are COMPLETELY random, so this would be a nice resource.
Can't make a suggestion like this without contribution so:
Emerald Moss, Leve ; Sapped Saplings (naked moles); 1 star
On the path to them @ 20/16 right near the first group of moles
inside; 1,400 gil
I just had the idea and only found one chest so thats all i got, later