At present, Hurricane Irene shows a forecast track which could affect Eastern Seaboard travel from Friday August 26 through Sunday August 29, possibly into Monday the 30th.
I suggest watching the National Hurricane Center's website for the several times per day updates, generally at 11 and 5 in both the morning nighttime hours. Of considerable value there are the "wind field" forecast maps, as they give the probabilities of a particular location's likelihood of experiencing damaging winds, which in turns tends to predict falling trees and power outages.
For those of us in central and eastern NC and VA, this looks ominous. Be ready. I bought two new chains for my chainsaw this morning and I test-fired my generator last night. I'll be purchasing propane and gasoline by Thursday & Friday if the present track forecast doesn't change. We were without power for 9 days after Hurricane Fran in 1996 and for 11 days after the 2002 ice storm. It's much more bearable with some minimal amount of electricity (TV, radio, refrigerator, a few lights), and cooking fuel.