I'm not sure any of the Canadian cell companies have an unlimited transit package. I had a look on Telus's site and they want $100 for 250 megs. and $3/M for overage and US roaming. If I was in Sprintland and could get unlimited usage for $60 per month, that'd be the way to go.
I'm in the same boat. My main interest is to be able to see real-time google maps or other topo data as I travel the Andes or Atacama desert, and with the mobile internet prices we get down here, it'd be cheaper to travel by helicopter
