Hello fellow Hyperion person!

I guess the obvious things to check:

1) You're doing this at Limsa's Maelstrom Command, right? (I did this when I started the game, not realizing that I needed to go back to 'my' GC, lol!)
2) Do you have the quest "My Little Chocobo" open? (started from R'ashaht Rhiki)

Only other requirements are:
2,000 Storm Seals
Quest: Till Sea Swallows All

Not sure what else needs to be done....