Dean is currently a weak hurricane, but it's already showing signs of being well-formed and defined, as it picks up strength on course to the Gulf of Mexico, which it could hit within three days, as seen in the predictive model below.
To me, this seems like bad news for previous hurricane victims. If Dean stays on course, it will hit Cancun and Cozumel, which were heavily damaged by Hurricane Wilma in 2005. If it goes north somewhat, it could slip in to the Gulf of Mexico with 125 MPH winds, not weakened or slowed down by landfall, and able to gain even more strength from the warmer gulf waters. This could be horrible news for a whole lot of people, and could, theoretically, cause some major problems with the oil infrastructure for the U.S.
Right now, the economy is precarious, for obvious reasons. If a strong Hurricane Dean makes landfall near a major U.S. city, it could potentially be bad news for the global economy.
I'm not feeling optimistic, but still... let's hope it fizzles out.