By popular demand, a thread devoted to the continuing decline of Arctic sea ice, and a potential new record minimum this year. As before, the figures are hot-linked and will update day-by-day.
JAXA Sea ice extent:

Cryosphere Today sea ice concentration (interactive chart):

Estimated sea ice volume from UW PIOMAS (updated every month):

Other links: Tamino, the very informative and detailed Neven’s sea ice blog , and some interesting predictions from Gareth Renowden.