Hey!
I came a cross this by accident and havent been able to check if it shows on server side, but it should!
i was leveling and got Burgy Blackheart's Handsome Hat - Item - World of Warcraft from an rare mob in vashjir,
when i later on was back in kalimdor i had the hat on my and noticed that when i fly out of the zone, the item reloads the effect and my flightform got really slow!
the buff was removed for flightform an replaced with the burgy item buff, so i equiped my other helm and flightform was removed and i was a tauren flying!
Tried when going from example, north to south barrens. and after that you can fly where ever you want, slowly
So!
Step 1: Equip piratehat!
Step 2: Enter Flight form
Step 3: Fly to another zone
Step 4: Replace helmet
Step 5: success!
Any1 can confirm?
Havent checked if it is serverside but really feels like it should be
EDIT:
Checked with a friend and this is server side! You can allso fly inside buildings, and shapesift to bear and you are a flying bear! and change between them, but not to flight form then you will loose the effect!