Inukshuks seem to be the unofficial symbol of Nunavut. They are built of stones to form a man-like figure, and traditionally they were used to keep caribou in one place - they were placed around valleys, and the caribou would think it was a hunter so would remain in the valley. I don't know how true that is, but in the Auyuittuq National Park, Inukshuks are used to mark the path. You look between the legs, and you can see the next inukshuk, and keep following them. You can buy inukshuk carvings, inukshuk badges, inukshuk stickers....
Watch out for bears, and get local advice! The emergency huts sited throughout the trail are only for emergencies, so don't use the provisions unless you really are in trouble. There is usually a logbook inside them, and a radio, as well as a stove and basic food - replace anything you use. Canada Parks have a pack-in pack-out policy, which means you should carry all rubbish out of the park with you.
In Pangnirtung, the tourist office, provided an evening of traditional Inuit food - caribou stew, arctic char(raw), and bowhead whale (we were extremely lucky to get to try this - the Northern communities are allowed to kill one Bowhead whale per year, and each community takes it's turn. The year we were there, it was Pangnirtung's turn, and the tourist office had a particularly grisly video of the catch)
Alcohol is forbidden in many of the smaller communities which are mainly Inuit villages (e.g. Broughton Island and Pangnirtung were officially 'dry'), but was allowed in Iqaluit, which means that there is some serious drinking done there, especially on pay day.