HI Jump.
I am looking also at the possibilty of a job with CX in JFK.
The Jump Seat deal looks pretty bad, and the company will not give you ID 90's until you have passed a certain period.(I believe it is 6 months)
If I do get the job I will need to commute from MIA or FLL, and it is not looking good. The only manner that is looking positive is just paying for my tickets with a company like JetBlue. I would recomend you to do the same with Air Tran.
Let me know if you have any more ideas.
Bubye.