Even when there's no hurricane, the actual flight path is seldom exactly a great circle route because of the wind pattern on the day. I've often gone far enough north on this route to see Greenland straight down (if it's daylight, which it usually is westbound). In a flight of nearly 4,000 miles, moving the middle a couple of hundred miles up or down doesn't increase the total distance much.

If anyone cares, I track hurricanes at this site:

http://www.msnbc.msn.com/id/26295161/ns/weather/

(It agrees with swag about Igor winding down by the 23rd.)