While this dead topic's alive again, I'll mention that there is an ice road (privately-operated, but apparently open to the general public with restrictions, including mandatory training), from Tibbitt Lake northeast of Yellowknife NT extending north into Nunavut. This is one of the roads featured in "Ice Road Truckers". For a map and some other info, see:
http://www.jvtcwinterroad.ca/jvwr/material%20combined/Y22100009-009_TCWR-Poster-updated-2006-info.pdfSee also this sign, at the road's entrance off NT 4, which I took in July of this year (the road status part of the sign is obviously a few months out of date):

Might be worth checking out, for those who are really, really impatient to drive into Nunavut, and don't mind driving in the cold and short days of Arctic winter. (Not for me -- while Nunavut's on my bucket list, what I have in mind is a summer trip involving some really expensive plane tickets.)