According to someone at PeakOil.com, the new issue of Hydrocarbon Processing has an article that predicts Cantarell will peak next year, and drop to zero by 2016.  Pretty scary to think Cantarell could be down to zero in ten years.
Cantarell has peaked and is firmly on the downslope, the only question is how fast and that looks ominously so. Think this was known in mid to late 2005, here's a recent link (first item):
http://energybulletin.net/12764.html
If Cantarell's decline rate is less than 8% per year i will be very surprised.

Oh, and Burgan, Kuwait, another of the big four, is on downslope too. That was a late 2005 news item.