I came across the European Space Agency web site the other day, and subscribed to it's RSS feed. An interesting, and worrying story about Arctic ice today. It's at its lowest since measurements began 30 years ago, and has taken a big drop this year.
Of course, the amount of ice declines every summer, but this year it's reached a level 25% lower than the previous minimum - 3 million square kilometers, compared with a record minimum of 4 million in 2005 and 2006.
Melting sea ice doesn't directly contribute to sea level rise, because it's floating. However, sea ice does help to keep the planet cool by reflecting sunlight better than water does.