2009: "[S]cientists at Cambridge University predict the Arctic ocean will be largely ice-free during the summer within the next ten years (i.e., by 2019)"
http://www.voanews.com/a/a-13-2009-10-15-voa41/414370.html
2007: Arctic summers ice-free 'by 2013'
http://news.bbc.co.uk/2/hi/7139797.stm
The date for the Arctic becoming "largely ice-free" appears to be receding about as fast as break-even fusion power. :-)