MEES (Middle East Energy Specialists) says OPEC oil production was
down by 460 thousand barrels in January. (Crude Only)
http://www.mees.com/Energy_Tables/crude-oil.htm
Those losing production were:

Country...Thousand b/d Down or Up Thousand b/d
Iran.......3,650......... Down 240
Nigeria....2,310......... Down 110
UAE........2,400......... Down 100
Saudi .....9,450......... Down 30
Indonesia... 920......... Down 10
Iraq.......1,580......... Up 30
All others were unchanged.

These figures are very close to those of the EIA for January (Crude
Only). The EIA had OPEC, crude only, down by 555 thousand barrels per
day in January as compared to December.
http://www.eia.doe.gov/emeu/steo/pub/3atab.html

The figures for Nigeria were largely caused by unrest in that country
but the figures for Iran and even Saudi Arabia, I believe is simple
depletion. Indonesia has been in steep decline for years. There is
some doubt about the UAE as 2005 is, so far, the year of their
highest production. At any rate I believe OPEC has clearly peaked.
They are producing one million barrels per day less than they
produced in October 2004.

Ron Patterson