The 9/28 raid looks like the culmination of an investigation that went on before 9/11. I know quite a few border guards in Texas and some INS guys here in DC. My border patrol friends say that since the 11th, they don't have time to check for illegal drugs anymore, not sure what that means but I assume they've changed their policies a little bit, perhaps more scrutiny of the people coming across and less to their bags, etc. Several of the border guards have always told me that their INS duties have always seemed secondary to their drug interdiction functions.
Also, I'm told by some INS friends here in DC that some ongoing investigations they were conducting with the DEA have been placed on indefinite hold and now they are only chasing down leads on potential terrorists.
I'm not sure what is really going on with the drug war, but I suspect the next few months will be light on the enforcement side.