AVWeb, reports this week that the GAO (General Accounting Office) issued a report last week "stemming from a federal audit triggered by improper spending by FAA officials in Alaska. According to the Associated Press, the investigation revealed that millions of dollars were involved in questionable spending elsewhere in the U.S. The GAO discovered over $6 million in improper expenditures via federally issued purchase cards."

Here is the report:
http://www.gao.gov/new.items/d02606.pdf