From this:

Federal officials have confirmed that the first Mexican truckers have been given authorization to run their long-haul rigs throughout the United States under the Department of Transportation's Mexican trucking demonstration project.

The word came during a late-night surprise teleconference held by John Hill, the administrator of the Federal Motor Carrier Safety Administration. He told selected reporters that Transportes Olympic of Nuevo Leon was the first company to be given the authorization...

The Teamsters are trying to block it in the court, claiming that the Bush administration didn't follow the letter of the law. Rep. Peter DeFazio - Democrat from Oregon - is on their side. Perhaps if unions and the Democrats were willing to oppose illegal immigration they might find even more support for their opposition. Note also that both the Federal Motor Carrier Administration and the Department of Transportation appear to be stonewalling WND. And:

"The White House does a much better job keeping Mexico informed than the U.S. public or Congress," [Todd Spencer, executive vice president of the Owner-Operator Independent Drivers Association] said pointedly. "Since March, we have credible reports that the Bush administration has been telling groups in Mexico that the one-year pilot program is merely a formality. Bush administration officials are willing to say in Mexico that once the one year had elapsed, the border would be wide open to all Mexican trucks."