The Antares/ORB-1 launch is now scheduled for January 8, 2014 with a launch window that extends from 1:32 - 1:37 pm EST. I may wander out and take a look, but don't expect it to be visible.
Update: Today's launch was scrubbed due to high space radiation levels. The next window is Thursday at 1:07 PM (EST). Still no night launch.
Update 2: The launch went off as planned earlier today and the Antares successfully put the Cygnus vehicle into orbit. I got sidetracked and didn't look for the launch. It appears that it was visible from my area. I'm a tad further, but if they could see it at GSFC, you could probably see it from my driveway.