Not really an emergency, but we had a window latch fall off the plane sometime while taxing (Went to close windows for takeoff, but found no latch) ... So we flew with a window open! (Which we can do, in accordance to the POH)
I fly around WNY, but have never flown into 9G0. I've heard KIAG (Niagara Falls) has good service/fuel. While you're there, I'd also do the lap around the falls (Look up the procedure for that tho, beforehand)