I just thought I'd draw your attention to this really cool website/blog that I've come across. It's updated on a daily basis by these two Aussies who are making the world's first trek across Victoria Island. The island is the 9th largest in the world, and 2nd largest in Canada.
The two guys are in their early twenties and are hiking, unsupported, across the tundra... and hauling something like 250kg of gear behind them, over all sorts of terrain.
Anyways, if you have some spare time, it's totally worth a look. Their website is http://www.1000hourday.com/