CoPilot-
To answer your question, the last time I was there, which was July 7th, the road was closed to all traffic for the last few blocks. So traffic had to be rerouted through the back streets (the first being a one way going the wrong way), so all traffic had to go two blocks south (through a neighborhood), one block east, and two again north, just to get to the ring road. This is not much of a way for the taxis to make a living, so they're just not around as much as they were. So, if you could actually carry your luggage along and then across the rock and dirt road (or if you're willing to really beat the snot out of your luggage, you could drag it), you could get over there, and then walk out to 65th, where you might get lucky, or you might walk a ways before a taxi showed up. But you couldn't walk down Airport Boulevard because it was closed to all traffic, even pedestrians (there was a large crane laying big drainage pipes).
-Tom