The big news about AM General is that Ron Perelman just bought a 70% interest. A couple of articles/releases:

http://www.autoweek.com/news.cms?newsId=100652
http://www.prnewswire.com/cgi-bin/stories.pl?ACCT=SVBIZINK4.story&STORY=/www/story/08-10-2004/0002229023&EDATE=TUE+Aug+10+2004,+01:40+PM

Taxpayers for Common Sense whitepaper explaining light-truck tax break and Hummers.
http://www.taxpayer.net/TCS/whitepapers/SUVtaxbreak.htm
Includes a dandy table entitled "First-year deductions on a
$110,000 Hummer H1"

Indianapolis Star article
http://www.globalsecurity.org/org/news/2004/040507-army-humvees.htm
This places the cost to the military of a new HumVee at betwen $200-250K. Also features returning character Sen. Evan Bayh (D-IN).

AM General corporate FAQs
http://www.amgeneral.com/corporate_faqs.php
Since AMG is a privately held company, it's not required to provide the kind of information to the public that a public company would be. Nonetheless, it's certainly worth taking a look at the company's public face.

Hope that's helpful!