The New York Times reports:
“Afghanistan produced record levels of opium in 2007 for the second straight year, led by a staggering 45 percent increase in the Taliban stronghold of Helmand Province, according to a new United Nations survey to be released Monday. The report is likely to touch off renewed debate about the United States’ $600 million counternarcotics program in Afghanistan, which has been hampered by security challenges and endemic corruption within the Afghan government.”
The article does note that in non-Taliban controlled areas in the north, opium production did decrease.