Below are links to PDFs of reports put together for Congress. The first details the activities and threats posed by the Mexican Cartels in 2007. One of the more interesting small details mentioned is the fact that aside from the Zetas being used for enforcers, there is also mention that former Kaibiles (Guatemalan Special Forces) are also being used.
Apparently the Cartels are equal opportunity employers.
The second report details the escalation of violence in 2008/9 as the Mexican government attempted to rein in the Cartels. Possibly a case of too little, too late.
It also goes to highlight the possible roots of the current Fast & Furious scandal.
As the old saying goes, never let a good disaster or emergency situation go to waste. Not when you can turn it to your own political and/or monetary advantage.
Assuming anybody reading the blog is interested (hard to tell since I lost my Hit Counter) please leave a comment, and I will try to put up more posts of this nature.