It's expensive, but available.
There were some rumors that gas stations were shutting down on Friday, which panicked a lot of people, but so far only a few stations have run out of gas, largely due to the panic on Friday.
All the stations I've seen in Northern Virginia (I'm right off 495/66) have gas.
Mtnbkr is in Roanoke this weekend. He'll be back and should be able to let you know the situation on Monday evening or Tuesday from that direction.