This website, http://www.iup.uni-bremen.de:8084/amsr/amsre.html, has fantastic images and movies of the current ice situation in the Arctic (and the Antarctic). They have a sattelite image of the current ice concentrations in the Northwest Passage that are updated every day.

They also maintain a video (below) which shows the last twenty days, and how the ice has been changing in the Northwest Passage. The darker sections are those where the ice is beginning to melt.