What is the Final Fantasy Five Four Job Fiesta?

The Final Fantasy Five Four Job Fiesta (FF5FJF) is simple!
Players sign up via Twitter for a selection of four random jobs from Final Fantasy V. Then they attempt to complete the game using only those jobs.
You can also login via Twitter and manage your runs on your page.

Who runs the FF5FJF?

But let's say your host is Gilgamesh over there in the corner. Make sure to say hello!