One thing that I always know-things can always change. There was an announcement today by the Department of Homeland Security over the issuing (or lack of issuing passports), from now until September 30th, 2007 you can travel to the Caribbean when you have acceptable proof of application for a passport. Then all you need is your state issued picture ID.
Print a copy of your online status receipt from http://travel.state.gov.passport . It's takes approx. 3 weeks for this to show on the site if you didn't expedite your passport, 1 week if you did! This will to give the passport department time to process the passports and catch up. So there is still time to get your passport going and get traveling!