This cool map offered by the USGS lets you look anywhere in the country to see past and current oil and gas production. How rich (in oil) is your state?
TIP: For an interactive map, go to the pulldown box in the center of the page and select Choose Map Size.

Here's a look at South Florida.

UPDATE: Download my News Illustrated page to see where undiscovered oil and gas deposits stretch beneath South Florida into the Gulf of Mexico.