I thought I'd post this link. I spend some time in Canada in the summer and frequent a canadian aviation site. This guy flew a rented 172 from the southern US to fly over the north pole. He planned for a year, staged fuel drums, waited out some weather, but made it about a week ago to the pole. He's just returned down south. Pretty cool.
Of note is that his spot transmitted position reports throughout the trip, missed very few, and worked well even over the north pole.
http://www.avcanada.ca/forums2/viewtopi ... 25&t=75176
Unfortunately his spot track is no longer on the map I pulled up.
This was a ballsy trip that the majority of folks tried to talk him out of.
-Brad