lostluggage08, I forwarded your claim number on to someone directly in Central Baggage Services--they're handling your claim now, rather than JFK, due to the length of time it's been open. I'm sincerely sorry that your bag has gone MIA, and depending on the circumstances, I know there are case where JetBlue does approve interim expenses after the first 24 hours. I apologize for not being more knowledgeable; baggage is not my area of specialty.
Someone from Central Baggage should be contacting you very shortly, if not already. I wish you the very best!